Margaret Plantagenet of Norfolk, Duchess of Norfolk, 2nd Countess of Norfolk, Lord Marshal, was born circa 1320 to Thomas of Brotherton (1300-1338) and Alice De Hales (1302-Bef 1330) and died 24 March 1399 of unspecified causes. She married John Segrave, 4th Baron Segrave (1315-1353) 1337 JL . She married Walter Manny, 1st Baron Manny (c1310-1372) 1354 JL . Charlemagne (747-814)/s, Henry II of England (1133-1189)/s, Hugh Capet (c940-996)/s, William I of England (1027-1087)/s.
|Offspring of Margaret of Norfolk and John Segrave, 4th Baron Segrave (1315-1353)|
|Edmund de Segrave (1337-1337)|
|Elizabeth de Segrave (1338-1368)||25 October 1338||9 October 1368||John de Mowbray (1340-1368)|
|John de Segrave (1340-1349)|
|Anne de Segrave|
|Offspring of Margaret of Norfolk and Walter Manny, 1st Baron Manny (c1310-1372)|