Thanks and you may be 100% correct as I looked at all the data connected to William Kennedy and his three marriages plus his children which included Alexander born 1801  and the name Alexander Kennedy is not one that is repeated in my Stapleton line of Kennedy Ancestors  although I do have Alexander Kennedy born 1885 who is a third cousin and Hugh Alexander Kennedy his son a 4th cousin
IGI website has a lot of data on Kennedy individuals but cannot source anything that connects William with spouses  Jane Davison Jane Wilson and Nellie Tweddle to my direct line
All information is very helpful 
Many Thanks
Edith A