The GIbb ( singular) sisters were from New England. Their names were Margaret and Mary and were conjoined twins, and quite attractive. They toured with various circuses and carnival acts including Clyde Beatty-Cole Brothers. They were born in l9l2 and died in l967. it may be argued they came in with the Titanic disaster and went out with Jayne Mansfield ( Mansfield"s fatal crash occured in l967, June 29. If this is the Gibb you are talking about. The Bee Gees- is a musical group and the name is a contraction of the Brothers Gibb- they are from Australia to my knowledge.