namesake

1. An entity that lends its name to another entity.
2. A person with the same name as another. · The statesman Winston Churchill has a namesake, the American novelist Winston Churchill.
3. One who is named after another, often a child named after the parent or an ancestor. · Bill Sr's namesake, Bill Jr, is 30 years younger.
4. One for whom another is named, often the parent or ancestor who gave the name to a child. · Bill Jr's namesake, Bill Sr, is 30 years older.
5. Something (especially a ship, a building, or a medical condition, symptom, or sign) that is named after someone or something.

Plural namesakes