Namesake (noun)

1. A person, place, or thing that has the same name as another.
2. A person who is named after another person.

Origin:

From name + -sake (as in namesake), from the phrase for name's sake, meaning for the sake of the name.

Examples:

1. The city was named after its founder, who was also its namesake.
2. He was named after his grandfather, and is his namesake.
3. The new ship was named after the famous explorer, and is the namesake of the original ship.
4. The restaurant was named after its original location, and is a namesake of the famous eatery.
5. The new baby was named after her grandmother, and is her namesake.