The Oxford Names Companion, OUP "Scottish Forenames" - Donald Whyte, FGH, FSG
Notes:
English and German from Aramaic "gazelle" or "doe"; NT Acts 9:36-41. Rare in Britain, more common in the US. The Greek equivalent is Dorcas which, like Tabitha, was popular in Britain from the 17th to the 19th centuries.
Thanks to Donald Whyte who provided much of the initial information for this site.