Yes, these Nevilles are the same family as Cecily Neville, the mother of Edward IV and Richard III. They were brothers descended from Edmund Mortimer through their father's mother.
You can explore the connections here: Richard of York, 3rd Duke of York
As a proponent of GENETIC MEMORY, something that my former wife proved in High School Biology by experimenting with simple swamp fauna called Planeria back in 1966....she proved that the subsequent off spring of Planeria she shocked with an electode in water and falshing a light just prior to the experience of being shocked was tansferrable to the F2, F3 F4 geneartions after the subjects in the first set were each disected and regrew their tissues....meaning the Planeria of F2,3.& 4 possibly 5 contracted whenever a light was shone on them as if ready to be shocked.... The Contractions were pronounced across 4 or 5 subsequent generations....This could only have occured by DNA transfer of the Physical Memory of being shocked after exponsure to a light source.
Human Beings are NOT, PLANERIA, BUT we do have biological systems that relatee back to the simplist of life forms so it is not too far a stretch to imagine that previous exposure to gentic material somehow sensitizes and makes some recombination more likely....or else the the ancient faces that recur in my famyly would never have occured en mass as they clearly have. I Bring this up because of Justin's execllent article on faces from our genetic Past on another thread....fyi DCR 1948 Nebraska Rices
Alan de Neville is William Owen "Bill" Irwin's first cousin 25 times removed!
William Owen "Bill" Irwin You → Maxson Greenman "Max" Irwin your father → Mattie Elizabeth Irwin (Greenman) his mother → Henry P. Greenman her father → Judge John Maxson Greenman his father → Mary Bliss (Maxson) Greenman his mother → Caleb Maxson her father → Tacy Lucy Maxson (Rogers) his mother → Judith Potter her mother → Margaret Helme her mother → Rouse Helme her father → Christopher Helme his father → Priscilla Helme his mother → Christopher Wentworth her father → William Wentworth his father → Oliver Wentworth his father → Thomas Wentworth, I his father → John Wentworth his father → John Wentworth, of North Elmsall, his father → Sir John Wentworth his father → Joan de Tyas his mother → Richard le Tyas her father → Ellen de Neville his mother → Alexander de Neville, Jr. her father → Alexander de Neville his father → William de Neville - c. 1123 his father → Gilbert de Neville, II his father → Geoffrey (1090-1154) Lord of Neville his brother → Alan de Neville his son