Nielsen Hayden genealogy
Family: John de Thornhill / Olivia de la Mare (F6294)
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Male
John de Thornhill
Birth Bef 1203 of Thornhill, Dewsbury, Yorkshire, England 
Death Bef 1250 Burial Marriage Father Richard de Thornhill | F1032 Group Sheet Mother Alice | F1032 Group Sheet
Female
Olivia de la Mare
Birth Death Burial Father William de la Mare | F3701 Group Sheet Mother Mabel de Malherbe | F3701 Group Sheet
Male
+ Richard de Thornhill
Birth of Thornhill, Dewsbury, Yorkshire, England 
Death 1287 Burial Spouse Maud de Fixby | F5579 Marriage