The mother of Helen, Countess of Winchester on Geni shows as NN (Helen?) , whose connected parents are Ragnall mac Somhairle, Lord of the Isles and Fionnghuala of Moray, Lady of the Isles .
Cawley shows "ROGER de Quincy...m firstly ([before 1223]) ELLEN of Galloway, daughter of ALAN Lord of Galloway & his first wife --- de Lacy ([before 1205]-after 21 Nov 1245, bur Brackley)." Cawley further claims finds no sure source proving who was the mother of Roger's next three children:
CAWLEY IS UNCONVINCED OF WHO GENI CALLS "NN (HELEN?)" BEING A WIFE OF ROGER:
[m [secondly] --- [of the Isles, daughter of REGINALD Lord of the Isles & his wife Fonie ---] (-before 1209). Balfour Paul says that Alan Lord of Galloway married first "a lady unknown, said to be a daughter of Reginald Lord of the Isles by whom he had two daughters"[1152]. He cites Chalmers’s Caledonia, but that says only that “the name of the first [wife] is unknown” without providing any indication of her family origin[1153]. Balfour Paul repeats his suggestion under the Lords of the Isles where he notes a daughter of Reginald Lord of the Isles "said to have married Alan of Galloway", without citing any source[1154]. There is no indication of the basis for Balfour Paul’s statements and no primary source which confirms this person’s parentage and marriage has been identified. Her existence should presumably be treated with caution until some such source emerges. If she did marry Alan, she was not the mother of his daughter Ellen shown below. She was either married before his marriage to “--- de Lacy” or before he married Margaret of Huntingdon: she is shown here, for presentational purposes only, as Alan’s possible second wife.]
https://fmg.ac/Projects/MedLands/SCOTTISH%20NOBILITY.htm#AlanGallow...