Germaine Greer (born 29 January 1939 is a famous Australian born Feminist Author. She is also an accomplished academic, journalist and scholar of early modern English literature. Germaine Greer is widely regarded as one of the most significant feminist voices of the later 20th century. She wrote the controversial "Female Eunuch" in 1970 which caused a great deal of controversy at the time.
Brooke Shields' youngest daughter is named Grier Hammond Henchy. I always preferred the "Greer" spelling because of Greer Garson, and the football player/actor from the 1970's, Roosevelt "Rosey" Grier.
Whoa, it's odd that you mentioned Kelsey Grammer's daughter. I went to elementary school with Greer and, although we're in different high schools, still talk with her a lot. So, I guess I know a somewhat important bearer of the name. :) By the way, her surname is spelled with an e: Grammer.