John de MARKENFIELD 
John de was born about 1382 in Markenfield, Ripon, Yorkshire, England. John de's father was Andro de MARKENFIELD. He was an only child. John de is no longer alive.
They had a son named Thomas.
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Children
Thomas MARKENFIELD
Thomas was born about 1365 in Markenfield Hall, Ripon, Yorkshire, England. He died after 1415 in Ripon Cathedral, West Ride, Yorkshire, England.