Alan de Moulton

ALAN de Multon, son of THOMAS de Multon & his first wife Sarah de Flete (-after 1250). Their children adopted the name Lucy. "Thomam de Lucy filium quondam Alani de Multon" and St Bees settled their dispute over "Lowswater" dated 10 May 1286[840].
m ALICE de Lucy, son of RICHARD de Lucy & his wife Ada de Moreville (-before 24 Mar 1288). The Cronicon Cumbriæ names “Amabillam et Aliciam, et successit Amabillæ Lambertus de Multon” as the children of “Reginaldo de Lucy” and his wife, adding that Lambert was succeeded by “Thomas de Multon de Egremond”[841].
Alan & his wife had children:
1. THOMAS de Lucy (-before 9 Apr 1305). m ISABEL de Bolteby, daughter of ADAM de Bolteby & his wife Philippa de Tyndal. Thomas & his wife had children:

a) THOMAS de Lucy ([1280/81]-before 24 Aug 1308). m CHRISTIAN, daughter of --- (-after 1319). No male heirs, no comment as to daughters.
b) ANTHONY de Lucy ([1282/83]-before 10 Jun 1343). He was summoned to Parliament in 1321 whereby he is held to have become Lord Lucy.

Anthony had a son Thomas, who married his cousin Margaret de Multon (from the Thomas-Thomas-Thomas line of Egremont), and two daughters, Joan (m. William de Melton) and Lucy (m. William lord Greystoke).

Sources

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https://en.wikipedia.org/wiki/Alan_de_Multon
Alan de Multon (died 1256), Lord of Papcastle, who held lands in Cockermouth, was an English noble.

He was the second son of Thomas de Multon and Sarah de Flete. His father paid one thousand marks to the crown for the wardship of the daughters and heirs of Richard de Luci and married them to his sons.[1] Alan died in 1256 and was succeeded by his son Thomas.

Marriage and issue
He was married first to Alice, daughter of Richard de Luci and Ada de Morville; they are known to have had the following known issue:

Thomas de Multon, married Isabel de Botelby, had issue. Thomas assumed the name and arms of Lucy.
Joan de Multon, married Ralph Dacre, had issue.
Citations

Burke, John. A General and Heraldic Dictionary of the Peerages of England, Ireland, and Scotland, extinct, dormant, and in abeyance. Henry Colburn, 1846. p. 379