|Grandma Walton. Source.|
Might mean "star" in Persian, or could be from the goddess Ishtar. Currently the 242nd most popular name in the US; peaked at #27 in 1896, probably because of President Cleveland's daughter. Worldwide, Esther is the 47th most popular name in Denmark, and is much lower everywhere else.
Famous Esthers: Queen Esther of the Old Testament; Esther Cleveland; Esther Williams (swimmer/actress).
Fictional Esthers: Grandma Esther Walton (of course!), Esther Smith, Meet Me In St. Louis
There are many others, but that's all I've heard of. Do you know any Esthers?
Source: Behind the Name