1. William MANDEVILL had the title 'Earl of Essex'.
William MANDEVILL had the following children:
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2. Beatrix MANDEVILL, daughter of William MANDEVILL, died in 1201. She married William de SAY.
William de SAY, son of Geoffrey de SAY ( - ) and Hanise? de CLARE ( - ), had the title 'Baron Say'. He and Beatrix MANDEVILL had the following children:
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3. Geoffrey MANDEVILL, son of William MANDEVILL, had the title 'Earl of Essex'.
4. Geoffrey de SAY, son of William de SAY and Beatrix MANDEVILL, died in 1215. He married Lettice MAMINOT.
He was the second son.
Lettice MAMINOT was the daughter of Walkelin MAMINOT ( - ) and Julian de VERE ( - ). She and Geoffrey de SAY had the following children:
| 5 | Geoffrey de SAY ( -1230). Geoffrey died in 1230. |