William of Rosslyn Sinclair

William of Rosslyn was born about 1145.  William of Rosslyn's father was Henry of Roslin Sinclair and his mother was Margaret Grathenay.  His paternal grandparents were Henry of Roslin Sinclair and Rosabel Fiorteith of Strathern.  He was an only child.  He died in 1214.

They had a son named Henry of Rosin.