Gen 22 - 25 de St. Omer

William de St. Omer (b. abt 1210 - d. aft 1265)

(unknown)
Petronilla "Petronel" de Lacy (d. aft 1288)

children: Thomas

• Ralph VI de Toeni (b. 1190 - d. 1239 at sea)
  
  children: Roger V, Constance
  

Thomas de St. Omer (b. abt 1240 - d. aft 1315)
Alice (unknown)
children: William

William de St. Omer (b. abt 1280 Brundale, Norfolk, England - d. abt 1341)
Elizabeth (unknown)
children: Thomas

Thomas de St. Omer (b. abt 1318 Norfolk, England - d. 1365 Henstead, Norfolk, England)
Petronilla "Pernel" Malmayns (b. abt 1325 Dorking, Surrey, England)
children: Alice
Margaret (unknown) (b. Wiltshire, England)
children: Katherine, Edmund
Elizabeth (unknown)