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Peterhead 1851 Census
District 13, page 27, No.141, 72 Kirk Street
Robert Kain, Head, 39, Fetteresso Kincardineshire
Hellen Kain, wife, 39, Lonmay Abd
Joseph Kain, son, 9, St.Fergus Abd
Adam Kain, son, 5, St.Fergus, Abd
Gordon Kain, son, 2, Peterhead
Duncan Kain, son, 11m, Peterhead
(Note: I might have incorrectly transcribed this as Kain or this is how it is in the census, would need to check).
Peterhead 1881 Census
District 18, page 5, Ravenscraig
Duncan Kean, head, 31, Ag. Lab., Peterhead
Mary Kean, wife, 39, Peterhead
No.53, 13/10/1863 at Backgate, Church of Scotland, Joseph Kean ship-carpenter, bach, age 23, Errol Street, parents: Robert Kean, carter (dead) and Helen Kean ms Scott married Ann J. Leslie, spin, age 27, Backgate, parents: Alexander Leslie, cooper (dead) and Mary Leslie ms Leask, witnesses: William Leslie and John H. Leslie.
No.86, Robert Kean carter married to Helen Scott, died 10/6/1863 at 7h 40 am, 19 Errol Street, male, 52 years old, parents: William Kean labourer (dead) and Mary Kean ms Blair (dead), cause: Apoplexy (cerebral), three days, informant: Samel Irvene, present, occupier.
Hope this helps.