I received this from the DUMFRIES-GALLOWAY list at Rootsweb.
Hope it helps.
SCOTTISH NAMING PATTERNS
Males:
First-born son = father's father
Second-born son = mother's father
Third-born son = father
Fourth-born son = father's eldest brother
Fifth-born son = father's 2nd eldest brother or mother's eldest brother
Females:
First-born daughter = mother's mother
Second-born daughter = father's mother
Third-born daughter = mother
Fourth-born daughter = mother's eldest sister
Fifth-born daughter = mother's 2nd eldest sister or father's eldest sister
In some cases you will find that the order is reversed with the first and second children, i.e., the first-born son being named after the mother's father, and the second-born son after the father's father. If this is the case then the daughters are also
reversed.
Barbara Brown Allen
researching Brown, Blacklock, Morgan, Hughs, Cock, Rome, Dennison, Ferguson, Smilski, Kulikowski