Malcolm de ROS 
He had a biological son named Peter (Piers) de.
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Personal Details
Malcolm de ROS
Malcolm de was born about 1064 in Ros, Holderness, Yorkshire, England. Malcolm de is no longer alive.
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Children
Peter (Piers) de ROS
Peter (Piers) de was born in 1087 in Ros, Holderness, Yorkshire, England. He died at the age of 66 in 1153.