[CrazyIvan]

“Ganges”- quite possibly from the samr root word as “gangrene”.

[Cronos]

gangrene comes via French from Latin gangraena, from Greek gangraina meaning an "eating sore".

Ganges comes from Ancient Greek Γάγγης ‎(Gángēs) from Sanskrit (गङ्गा ) ‎(gáṅgā, literally “swift-goer”), from verbal root √gam ‎(√gam, “to go”).

Remember that both are Indo-European languages.