Research Notes:

"Eudo comes" founded the abbey of Notre-Dame de Lantenac by charter dated 1149, witnessed by "Josthos et Alanus fratres comitis, Alanus vicecomes de Monteforti…". "Eudo comes" confirmed a donation to Saint-Martin de Josselin made by “Dominus Gaufridus pater meus”, with the consent of "fratrum meorum…Joscii vicecomitis et Alani Ceoche", by charter dated 1153.

He established himself in England in or before 1172 as ALAN [I] la Zouche, the name presumably being based on “Ceoche” as recorded in the previously quoted charter. The Red Book of the Exchequer refers to "Alanus la Zuche xx s per vicecomitem" in Northamptonshire in [1171/72]. “Alanus la Zouche filius Galfridus vicecomitis” donated "ecclesiam de Essebi" to Lilleshall Abbey, Shropshire, for the salvation of “uxoris meæ Aliciæ et puerorum nostrorum” and for the souls of "Philippi de Beumeis senioris et Philippi junioris et cæterorum filiorum eius", by undated charter. Eyton quotes another transcript of this charter which adds as witnesses "Roger de Mortimer…Dame Adheliza de Belmes, William de Belmes her son, Philip de Belmes his brother…", and supposes that the document can be dated to [1185/90]. ¹

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ALAN CEOCHE, or LA COCHE, otherwise LA ZOUCHE, younger brother of Eudon, or Eon, VICOMTE OF PORHOËT, sometime (1148-56) recognized jure uxoris as DUKE OF BRITTANY, both being sons of Geoffrey, VICOMTE OF PORHOËT (died 1141), by Hawise, daughter of Alan FERGANT, DUKE OF BRITTANY, assented to his brother Eudon's charter to the Abbey of Marmoutier in 1153. He is first mentioned in England in 1172, when the sheriff of Northants answered for the scutage due from one knight's fee on his lands; there are many references to him in lawsuits, 1175-90, and as Alan la Zouche of North Molton he was fined in Devon in 1185. He married Alice, daughter and (eventually) heir of Philip de BELMEIS, of Tong, Salop, Ashby, co. Leicester, &c., by Maud, daughter and coheir of William LE MESCHIN, of Skipton-in-Craven. He died 1190. ²