Elsie McKenzie married William Munro in Cromdale in 1871. View the marriage certificate to make sure it's the right Elsie/Elspet.
They had two children
William Alexander John Munro, born 12 June 1873
John, born 5 November 1874
In 1881, in Tenement no 13, north side, Cromdale (that will be in Grantown - check the original to be sure) are
William Munro, head, 37, mason
Elsie Munro, wife, 36
William Alexr Munro, son, 7
John Munro, son, 6
all born in Cromdale