The McIntyres mistranscribed on the census index I am looking at for 1851 but Grace is showing as born in Stirling not Comrie in 1851 (1841 she showed as born outside of the county of Perthshire too):
Donald Mcintye 43, saw mill lab. b. Comrie
Grace Mcintye 34 b. Stirling, Stirlingshire
Jean Mcintye 15
Daniel Mcintye 12
Elizabeth Mcintye 10
Robert Mcintye 8
Hellen Mcintye 2
Address: East Comrie, Comrie
Monica