Marie, I wish I can answer your question definitively but I am not anywhere near an expert on the variations of the surname TEESDALE. However, have you friend contact Mr.. Ronald H. Teasdale at teasdale46@one-name.org . Mr.. Teasdale also has a web site devoted to the surname TEASDALE it is www.teasdale47.freeserve.co.uk . Good luck on the research Harrold H. Black Jr Dickerson Run Pa, USA researching: BLACK, TEESDALE, ADAMSON, NEILSON, STEWART