I found 3 of Samuel and Margarets children in 1901 census:
250 Middle Division, Carrickfergus
William Kerr (HOF) 30 General labourer
Maggie Kerr (Sis) 34 Weaver
Ellen Kerr (Sis) 25
Also at 5 Irish Quarter West, Carrickfergus, my Great Grandfather John Kerr with his wife Margaret, father in law William Hay, Children, Sarah (7) Elizabeth (4) Ellen (3) and Wilhilmina (1)
By1911 census I found John Kerr living with his brother and sister William and Maggie and his 7 children, living in Matchett Street, Belfast. Any info would be great regarding any of the Kerr family, many thanks..