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Male Alan La Zouche Click to view Alan La Zouche in the family tree

Alan was born in 1267.1   Alan's father was Roger La Zouche and his mother was Ela Longespee.  His paternal grandparents were II Alan and Helen (Ellen) De Quincy; his maternal grandparents were Stephen Longespee and Emmeline De Riddleford.  He was an only child.  He died at the age of 47 in 1314.1 

Family Details of Alan's family with Elenor De Segrave

1 phelps.FTW @ Tree #1353
Further sources/citations:
World Family Tree Vol. 4, Ed. 1 @ Tree #0574, 0574.ftw