Looking for Information on Lowe Family of Scotland

George Lowe married Isabella Brown and had the following children:

Janet Lowe B: about 1842
Isabella Lowe B: about 1845
Catherine Lowe B: about 1847
Mary McDougall Lowe B: 6 March 1849 Old Cumnock. Married John Black 17 June 1887, 6 Sharp Street, Govan,Scotland. Had two children John Black B:? & Isabella Brown Black B: 11 December 1889, 22 White street, Govan, Scotland.
Jean Lowe B: about 1851
George Lowe B: about 1856

Mary McDougall Lowe was my Great Grandmother and I would love to find out who her siblings married.