This famiy is a mess.

Margaret de Killet Birth: 1230 Over Kellet, Bolton-Le-Sands, Lancashire, England
Death: 1285 (55)

However, if her father Adam was born about 1154, and her mother was born about 1158, they were quite old to
have Margaret in 1285. Margaret had her first child about 1240 so1220 would be a good date for her, but her
father died in 1185 so that 1220 goes to 1185 and that makes her too old to have a first child in 1240. Clearly this
family has to be re-thunk.