Achilles' heel and Adam's apple, e.g

• Cardigan and leotard, e.g
• Guillotine and Oscar, e.g
• Names derived from people
• Nikola Tesla and Louis Chevrolet
• Leotard and Silhouette, e.g
• Jules Léotard and Amelia Bloomer, for two
• Those who lend their names
• Watt and Ampere, to the watt and ampere
• People after whom things are named

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