Emma de Port 
Emma de was born about 1049 in Seamer, Scarborough, North Ride Yorkshire, England. Emma de's father was Hugh de Port , Lord of Semer. She had a brother named Hugh de. She was the older of the two children. Emma de is no longer alive.General Notes
Emma, sometimes called daughter and heiress, but certainly a close relative, of Hugh de Port, feudal Lord of Semer, near Scarborough, and a Saxon. [Burke's Peerage]
Note: According to Complete Peerage & also Origins of Some Anglo-Norman Families, Hugh de Port, was a Norman; perhaps Burke's is stating that his wife was a Saxon, at least that is the way I am interpreting it.
They had a son named Alan "The Great Alan" de.
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Children
Alan "The Great Alan" de Percy , Sir
Alan "The Great Alan" de was born in 1069 in Percy-en-Auge, Calvados, Normandy, France. He died before December 1135.
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