no!
The ancient Greek Gods did not have second (or family) names.
theres Athena and Artemis goddesses of wisdom and hunting respectively
Mars Candybars
ZeusHermesCronusPsycheHephaestusDemeterGaeaAphroditeHadesPoseidonApolloAresArtemisAthenaDelusionEileithyiaFury/FuriesHebeHeraIrisLetoMuseOceanStrifeThetisTitansXanthusNikeNemesisDionysusErisErosHephaestusPersephoneHestiaHebeHeliosThanatosHerculesMorpheusHecatePan
There are many names, and in some cases, the names and titles of a goddess number into near the hundreds. We are yet still uncovering more goddesses.
By Latin and Greek words
Greek gods/goddesses did not have "last names" they had titles/epithets.
Demeter and Artemis are Greek goddesses with seven letters in their names.
Greek mythology came first. Then the Romans came. They admired the gods and goddesses of the Greeks and copied. The Roman gods and goddesses and more disciplined and war-like. Because Greek and Roman mythology things can't have the same name, Romans changed the names.
We get all shape names (Polygons) from the greek language.
Athena, Aphrodite, Demeter, Artemis, Hera, Hestia.
with some weird names like zeus=jupiter with some planets