Sandra,
Sorry I should have put the dates K.B. Book 2 covers burials only 1849 -1894 it is in the Museum. The names you mentioned no show in burials at K.B. but there again Book 2 might hold something. I did check St Georges Chapel Douglas burials by the IomFHS and there are approx 12 Bridsons and 7 approx Alexander buried there. It could be worth checking up on.
Cheers ....Brian... www.kneen.com