John de Mowbray 3rd Baron Mowbray(29 Nov 1310 - 4 Oct 1361)John Segrave 4th Baron Segrave(4 May 1315 - 1 Apr 1353)
Joan Plantagenet of Lancaster(abt 1312 - 7 Jul 1349)Margaret Plantagenet Duchess of Norfolk(abt 1320 - 24 Mar 1399)
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Children
> Joan De Mowbray(1363 - 1402)