If a person, place, or thing is named after a different person, place, or thing, the latter is said to be the namesake of the former. This is most often the case with people, where a child is named after somebody of significance to the parents and/or child.
Example Usage of Namesake
kylemurley: wants to see: 011- The Namesake: Gogol Ganguli (Kal Penn) is torn between his parents' (Irrfan Kha.. http://bit.ly/1bGB88
LRADL: oia,td d pameran buku dpt siddharta-hermann hesse, tuesday with morrie-mitch albom, ama the Namesake- humpa lahiri. peer bacanya tmbh pnjg..
liquidindian: I can't think of a good reason not to follow my Namesake @alancmiller.