Question: Margaret of Huntingdon (died before 1228) was the eldest daughter of David, Earl of Huntingdon (died 1219) and his wife, Maud (died 1233), sister of which earl that died in 1232, was one of the "old school" of Anglo-Norman barons whose loyalty to the Angevin dynasty was consistent but contingent on the receipt of lucrative favours? 
Sentence (from "Helen of Galloway"): Helen was the first wife of Roger de Quincy, Earl of Winchester (died 1264).
Relevant evidence: No