Richard Comyn Lord of Tyndale
Richard was born in 1115.  He died at the age of 30 in 1145.

 Hextilda FitzHuchtred
Hextilda was born in 1122.

 William Comyn Earl of Buchan
William was born in 1163 in Altyre,Morayshire,Scotland.  He died at the age of 70 in 1233 in Buchan,Aberdeenshire,Scotland.