Laurence married Agnes De Mortimer, [Countess of Pem after 29 May 1328 in HEREFORD, Herefordshire, England. Agnes (daughter of Roger Mortimer, [EARL OF MARCH] and Joan De Geneville, [Countess of Mar) was born about 1313 in , Wigmore, Herefordshire, England; died about 1368; was buried in Minoresses Churc, Without Aldgate, Middlesex, England. [Group Sheet] [Family Chart]