Nikola Tesla and Louis Chevrolet

• Watt and Ampere, to the watt and ampere
• Seattle and Vancouver
• Ancestors for whom tribes are named
• Jules Léotard and Amelia Bloomer, for two
• Cardigan and leotard, e.g
• Words derived from people's names
• Achilles' heel and Adam's apple, e.g
• People who lend their names to things
• People things are named for

Wiktionary Word definitions in Wiktionary
n. (plural of eponym English)