Credit to Mike Myler for the original conversion. Summarised here for my PCs as part of the upcoming Clash of the Titans campaign.

RACES

EVERYBODY IS A HUMAN but has a Bloodline that makes them unique, proper classical heroes tied to the gods. Plus everybody gets a feat of their choice at 1st level.

Thylean Names

Names in Thylea have a Greek/Roman flavour to them. This applies to both humans and non-human races.

Male Names: Adonis, Adrian, Alexander, Agrippa, Basil, Belen, Bemus, Calix, Claus, Corban, Cy, Damen, Darius, Demitrius, Deo, Dru, Egan, Estevan, Evan, Faustus, Flavius, Giles, Gregory, Griffin, Isidore, Hector, Jace, Jorges, Julian, Kal, Karan, Keelan, Kyril, Lander, Layland, Leo, Magus, Mateo, Neo, Nicholas, Nicos, Odell, Orelius, Orrin, Paris, Pancras, Pearce, Philip, Quinn, Rastus, Sander, Santos, Sirius, Spiro, Stavros, Tadd, Tassos, Theo, Timon, Tyrone, Vitalis, and Xander.

Female Names: Adara, Adrianna, Aegea, Aria, Ava, Bryony, Cadie, Calista, Calla, Cara, Cleo, Dalia, Daria, Demi, Desa, Diana, Dora, Echo, Electra, Falana, Finn, Galena, Gemina, Halia, Hatria, Hester, Idylla, Iliana, Ina, Irene, Iria, Jacinda, Jenesis, Justina, Kaia, Kat, Kiersten, Lacie, Layna, Leah, Lyssa, Madelia, Mariam, Maya, Melani, Nara, Nora, Orelle, Pamela, Penelope, Petra, Rhoda, Sophia, Seema, Selena, and Tabatha.

If you are really stuck here is a greek and roman name generator.

BLOODLINES

Your bloodlines here grant proficiency in one skill or tool kit, a +2 increase to one of your related god’s attributes, a +1 increase to another of the related god’s attributes, and a special bloodline feature chosen from the two presented.

When a bloodline feature calls for a saving throw, it is equal to DC 8 + the demigod’s proficiency bonus + the demigod’s Charisma modifier. Spells granted by a bloodline are innately cast without the need for material components and where noted are modified as though cast using a sorcerer’s metamagic features. Note that these abilities are available once every 24 hours, not once between long rests.

To randomly generate a bloodline roll a 1d30 and any roll above 27 you get to choose your bloodline.

Anemoi (the Winds)

Proficiency: Acrobatics
Attributes: Dexterity, Constitution
Bloodline Features: Gust of wind once per day or extended expeditious retreat once per day.
Piety Effects: Standard (see the general Piety entry in the campaign primer).

Aphrodite

Proficiency: Persuasion
Attributes: Constitution, Charisma
Bloodline Features: Extended charm person once per day or heroism once per day.
Piety Effects: Standard (see the general Piety entry in the campaign primer).

Apollo

Proficiency: Perception
Attributes: Dexterity, Wisdom, Charisma
Bloodline Features: True strike (as a bonus action) once per day or cure wounds(as a 2nd-level spell) once per day.
Piety Effects: Standard (see the general Piety entry in the campaign primer).

Ares

Proficiency: Athletics
Attributes: Strength, Constitution
Bloodline Features: Ares’ Rage once per day or Battle Aura once per day.
- Ares’ Rage. As a bonus action you enter a rage similar to barbarian rage, gaining a +2 bonus to Strength or Constitution (chosen when you begin to rage; this cannot increase an ability score past 20), a +1 bonus to Wisdom saving throws, and a -1 penalty to AC. Activating this ability is a free action and it lasts 1 minute.
- Battle Aura. Once per day as a bonus action, your awesome presence frightens enemies within 20 feet of you causing them to be frightened for 1d4 rounds.
Piety Effects: Iroas or Mogis (choose one)

Amazonian Blood. As Ares is the patron of the Amazonians, female characters may instead choose to have Amazonian blood. You use the half-giant as your race.

Artemis

Proficiency: Survival
Attributes: Dexterity, Constitution
Bloodline Features: True strike (as a bonus action) once per day or Artemis’ Arrow once per day.
- Artemis’ Arrow. After hitting a creature with a ranged weapon attack, as a bonus action, you can choose to force the target to make a Wisdom saving throw or be stunned for 1 round. If you use this feature in conjunction with a bow, the DC increases by 1.
Piety Effects: Standard (see the general Piety entry in the campaign primer).

Athena

Proficiency: Arcana
Attributes: Constitution, Wisdom, Charisma
Bloodline Features: Heroism once per day or your AC increases by 1.
Piety Effects: As Ephara.

Demeter

Proficiency: Nature
Attributes: Constitution, Wisdom
Bloodline Features: Extended goodberry once per day or barkskin (self only) once per day.
Piety Effects: Standard (see the general Piety entry in the campaign primer).

Dionysus

Proficiency: Nature
Attributes: Constitution, Charisma
Bloodline Features: Entangle once per day or hideous laughter once per day.
Piety Effect: Karametra.

Eos

Proficiency: Survival
Attributes: Constitution, Charisma
Bloodline Features: Light at will or enhance ability (Charisma and self only) once per day.
Piety Effects: Standard (see the general Piety entry in the campaign primer).

Eris

Proficiency: Deception
Attributes: Dexterity, Constitution
Bloodline Features: Betrayal once per day or Eris’ Fury once per day.
- Betrayal. This heightened (to 2nd level) and specialized form of lesser confusion causes the target to attack an ally for 1 round.
- Eris’ Fury. You imbue you or a willing creature you touch with an effect like Ares’ Rage, except that when Eris’ Fury ends you gain one level of exhaustion.

Eros

Proficiency: Insight
Attributes: Dexterity, Charisma
Bloodline Features: Extended charm person once per day or hideous laughter once per day.
Piety Effects: Standard (see the general Piety entry in the campaign primer).

Hades

Proficiency: Intimidation
Attributes: Constitution, Intelligence
Bloodline Features: Vampiric Touch (discharges after the first successful hit) once per day or Battle Aura once per day.
Piety Effects: As Atherios or Erebos (choose one).

Hecate

Proficiency: History
Attributes: Intelligence, Charisma
Bloodline Features: Fog cloud once per day or darkvision (self only) once per day.
Piety Effects: Standard (see the general Piety entry in the campaign primer).

Helios

Proficiency: Animal Handling
Attributes: Constitution, Charisma
Bloodline Features: Daylight once per day or extended expeditious retreat (self only) once per day.
Piety Effect: As Heliod.

Hephaestus

Proficiency: Smith’s tools
Attributes: Constitution, Intelligence
Bloodline Features: Extended magic weapon once per day or heat metal once per day.
Piety Effect: As Purphoros.

Hera

Proficiency: Persuasion
Attributes: Wisdom, Charisma
Bloodline Features: Detect thoughts once per day or shatter once per day.
Piety Effects: Standard (see the general Piety entry in the campaign primer).

Hermes

Proficiency: Stealth
Attributes: Dexterity, Intelligence
Bloodline Features: Extended expeditious retreat (self only) once per day or invisibility (self only) once per day.
Piety Effects: Standard (see the general Piety entry in the campaign primer).

Hestia

Proficiency: Nature
Attributes: Constitution, Wisdom
Bloodline Features: Aid once per day or sanctuary once per day.
Piety Effects: Standard (see the general Piety entry in the campaign primer).

Iris

Proficiency: Navigator’s tools
Attributes: Intelligence, Wisdom
Bloodline Features: Blindness once per day or message three times per day.
Piety Effects: Standard (see the general Piety entry in the campaign primer).

Muses

Proficiency: Performance
Attributes: Intelligence, Charisma
Bloodline Features: Heroism once per day or shatter once per day.
Piety Effects: Standard (see the general Piety entry in the campaign primer).

Nike

Proficiency: Athletics
Attributes: Strength, Constitution, Wisdom
Bloodline Features: Extended jump (self only) once per day or Nike’s Blessing (self only) once per day.
- Nike’s Blessing. You gain a +1 bonus to saving throws, attack rolls, ability checks, and weapon damage rolls for 1 round per point of proficiency bonus you possess.
Piety Effect: As Iroas.

Pan

Proficiency: Performance
Attributes: Dexterity, Constitution
Bloodline Features: Extended charm person once per day or extended expeditious retreat (self only) once per day.
Piety Effect: As Phenax.

Poseidon

Proficiency: Vehicle (water)
Attributes: Strength, Constitution
Bloodline Features: Earth tremor once per day or blur (self only) once per day (though rather than being blurred, the character is surrounded by a concealing mist of watery droplets with the same effect as the spell).
Piety Effect: As Thassa.

Selene

Proficiency: Investigation
Attributes: Wisdom, Charisma
Bloodline Features: Light at will or sleep (as a 2nd-level spell) once per day.
Piety Effects: Standard (see the general Piety entry in the campaign primer).

Titan (any)

Proficiency: Athletics
Attributes: Strength, Constitution, Intelligence
Bloodline Features: Enhance ability (Strength only, self only) once per day or enhance ability (Constitution only, self only) once per day.
Piety Effect: As Mogis.

Zeus

Proficiency: Persuasion
Attributes: Strength, Constitution, Charisma
Bloodline Features: Heroism once per day or Thundering Smite once per day.
- Thundering Smite. After hitting a creature (either before or after you roll damage), you can choose to invoke the power of Zeus’ thunderbolt upon your enemy. A blast of electricity and thunder is channelled through your weapon to your enemy, dealing +2d6 points of damage, half of which is lightning and half thunder. Every five levels (at levels 5th, 10th, 15th, and 20th) this damage increases by +1d6 (to a maximum of +6d6).
Piety Effect: Keranos.

Fey

Though you look human you have monstrous/non-divine/non-human ancestry. You may choose any race available here and gain all the benefits of that race but you always look human – though you may have a minor affectation that reflects your true heritage. You also gain a supernatural gift.

CLASH OF THE TITANS – Humans