Sources

1) Source: Regesta regum Anglo-Normannorum, 1066-1154 (2 volumes) "Notification by Henry I, 'by the grace of God King of the English and Duke of the Normans' to the Archbishop of Rouen and all of Normandy: That he has given to SS. Gervase and Protase of Sées, for the use of the bishop, the fee of Laleu (Alodii) [Orne] which William Goth held and the King bought from his niece Aveline and her son Richard de Lucy (Luceio), and they delivered to Robert Earl of Gloucester. Witnesses: Hugh Archbishop of Rouen, John Bishop of Lisieux, Audoin Bishop of Évreux; Richard Bishop of Bayeux, John Bishop of Sées; Robert de Sigillo; Nigel nephew of the Bishop of Salisbury; Robert Earl of Gloucester, the King's son; William Earl Warenne; Waleran Count of Meulan; Robert Earl of Leicester; Robert de la Haie, sewer; Hugh Bigod, sewer; Rabel [de Tancarville] the chamberlain; Brian Fitz Count, constable; Geoffrey de Clinton.". Reference: Volume 2, page 247. 1 (Questionable reliability of evidence)
2) Source: Duchy of Lancaster: Deeds, Series L "Grant to Rose de Dover of her inheritance from the lands of Richard de Lucy, her grandfather."Dated: 1213 Clear evidence for Richard being Rose's grandfather (though not for Geoffrey being the father). External Link
http://discovery.nationalarchives.gov.uk/details/r/C3540496. Reference: DL 10/63 (Data from direct source)
3) Source: Exchequer: Treasury of Receipt: Ancient Deeds, Series A "Grant by Roheisia de Duvr' to the canons of Holy Trinity, London, of 10s. yearly that Richard de Luci her grandfather gave them for the soul of Roheisia his wife, her grandmother, who is buried in their church". Dated: Unknown. External Link
https://discovery.nationalarchives.gov.uk/details/r/C4941078. Reference: E 40/2325 (Data from direct source)