Events
Date of Birth: about 1155.
The date is given by Eyton (7:228), based on William apparently having livery of his Shropshire barony about Midsummer 1175.
Date of Death: 1210.
The date is given by Phillips (FitzAlan (of Oswestry)). Lieberman (p. 88) gives about 1210.
Relationships
Father: William FitzAlan (died 1160).
This relationship is given by the Complete Peerage (5:392) and by Keats-Rohan (p. 861).
Mother: Isabel, daughter of Elias de Say, lord of Clun.
This relationship is given by Phillips (FitzAlan (of Oswestry)), by Keats-Rohan (p. 861), and by Lieberman (p. 88).
Spouse: a daughter of Hugh de Lacy, lord of Meath.
This relationship is given by Phillips (FitzAlan (of Oswestry)) and by Lieberman (p. 88).
Children:
(Complete source citations for facts about the children on this page are currently outside of the scope of this project. Most information below comes from Cawley and Eyton.)
William FitzAlan (died Easter 1215) married Mary, daughter of Thomas de Erdington.
John (I) FitzAlan (died 1240) married Isabel d’Aubigny.
Agnes married Philip de Kyme.
Petronilla married Walter de Dunstanville.
References
Cokayne, George Edward, and Vicary Gibbs; et al. The complete peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, extant, extinct, or dormant [2nd ed.]. (London: St. Catherine Press, 1910-59).
Eyton, R.W. Antiquities of Shropshire 12 Volumes (London: 1854-1860).
Keats-Rohan, Katharine S. B. Domesday Descendants: A Prosopography of Persons Occurring in English Documents 1106 - 1166. (Woodbridge: 2002).
Lieberman, Max. The Medieval March of Wales (Cambridge University Press, 2010).
Phillips, Chris. “Some corrections and additions to the Complete Peerage.”