The biography already notes that Jannet Sempill's cited parents are unlikely. She is currently linked to William Semphill-9 and his wife. William might actually be younger than Janet but almost without a doubt too young to have fathered her. The Family Knox source merely states she was daughter of Lord Sempill but that is quite ambiguous. Some, with equal lack of primary sources, have opined that she was the daughter of Willliam Sempill-57 of Fullwood (possibly, but his pedigree has some issues as well).
Anybody know of any primary sources to identify her father? Should we disconnect her from her current parents in either case?