Try the 1881 census John (age 48), retired joiner, born in German, and Maria (55),born in Patrick, living in Onchan with Margaret Callister (widowed mother in law, of German, age 77) and Louisa M. Quine (unmarried step daughter, age 22 also from German). If these fit, it should be able to trace Callister/Quine and Cowley/Quine in an earlier census and in the IGI.