Greek and Sanskrit

Here's a strange thought that hit me:

The Greek 3 headed giant Geryon is slain by Hercules, who then takes
his cattle.
The Vedic 3 headed giant Trisiras/Visvarupa is slain by Trita & /or
Indra.

Trisiras is referred to as "Goarnes" - 'rich in cattle'.
Could Goarnes be a cognate of Geryon ??

Regards,
Aydan