Does anyone have any information about the family of Euphemia Henrietta "Effie" MacSween (b. March 1826 in Scotland)? She married Murdock Kerr in 1850 in Rockyside, Englishtown, Victoria County. Her death certificate indicates that she was the daughter of Malcolm MacSween and Mary Kerr.

Murdock Kerr and Euphemia Henrietta "Effie" MacSween had children:
John W. Kerr (1853 - 1934)
Malcolm J. Kerr (1860 - 1902)
Margaret "Maggie" B. Kerr (1862 - )
Duncan Kerr (1866 - 1895)
John Roderick Kerr (1869 - 1935)
Mary Ann Kerr (1875 - 1906)

I would be very interested in hearing anything about Effie's parents, Malcolm MacSween and Mary Kerr as well as any sibling/geographic information anyone might have.