Layton is a surname derived from various place names in England.
 Two known etymologies stem from place names in Lancashire (in Blackpool) and another in North Yorkshire.
 The former was named in Old English as ‘settlement by the watercourse’, from Old English lād ‘watercourse’ + tūn ‘enclosure’, ‘settlement’; the latter as ‘leek enclosure’ or ‘herb garden’, from lēac ‘leek’ + tūn.
 Also often spelled as Leighton.
 Notable people with the surname include:
The English family name Relph is classified as being of personal name origin.
 According to scholars the "oldest and most pervasive type of surname is that derived from a personal name".
 Such family names may be derived from a parental first name or from the front name of the grandfather, or indeed a more remote ancestor of the original bearer of the surname.
 In this case, the surname "Relph" is derived from the Anglo-Saxon name "Richolf", derived from the Old German "Ricwulf", meaning "power wolf".
 The form "Riulf" from the Old French became popular at a later stage, probably due to the Normans who settled in England in the eleventh century.
 Variants of the surname "Relph" include "Relf", "Relfe" and "Realff".
Hugh d'Avranches (  1047  – 27 July 1101), also known as Hugh the Fat (French: "Hugues le Gros" ) or Hugh the Wolf (Latin: "Hugo Lupus" ), was the second Norman earl of Chester (2nd creation) and one of the great magnates of early Norman England.
Fuqua is a surname derived from a Franco-Germanic word meaning "guardian folk".
 The current spelling, and its variants Fuquay and Fewquay, are Anglicisations of the French Fouquet.
 Several Fouquets are known to have emigrated from France to the United States during the Huguenot period, including Guillame Fouquet, from whom the vast majority of the American Fuquas outside of Louisiana trace their lineage.
 The most common pronunciations are /few-kway/ or /few-kwa/.
Richard Lovett was an Anglo-Norman baron under William the Conqueror.
 The surname derived from the Anglo-Norman French "Lo(u)vet", a nickname which meant 'wolf cub.'
 Richard Lovett's sons, William and Robert Lovett were rewarded with land grants in England that were listed in the Domesday Book and stayed with the family into the twentieth-century.
Déniz or Deniz (also written Denis in some parts of South America, see Denis) is a Spanish-Portuguese surname derived from the French surname De Niz.
 People with Déniz surnames can be found mostly in the Canary Islands, Azores, Madeira and in the Americas (USA, Cuba, etc.).
Oliver is a surname derived from the Old French personal name "Olivier".
 The Oliver surname seems to be French Norman in origin.
 The Scottish Oliver family was a sept of the Scotland Highlands' powerful Clan Fraser of Lovat.
Grosvenor ( ) is a surname derived from Hugh Le Grand Veneur, a member of a Norman French family that aided William the Conqueror in 1066.
 "Le Grand Veneur" literally means "the Master Huntsman" in French, an elevated title in William's 11th century French court.
 Initially, Hugh was called Hugh Lupus.
 Lupus was portly, and his townsmen gradually changed the appellation from "Le Grand Veneur", "the Master Huntsman," to "Le Gros Veneur", "the Fat Huntsman", and Hugh wore the epithet with pride.
Mayor is an English and Spanish-language surname with several etymological origins.
 The English-language name is sometimes a variant spelling of "Mayer", and thus derived from the Middle English and Old French "mair", "maire" (in turn derived from the Latin "maior", meaning "greater", "superior"); this surname originated from the title of a mayor.
 The surname "Mayor" can also be derived from a nickname, derived from the Spanish "mayor", meaning "older", borne by the elder of two individuals with the same name.
 Another origin of the surname is from an occupational name, derived from the Spanish "major", meaning "governor", "chief".
 The surname can also be a Catalan variant of the surname "Major", derived from "major", meaning "greater", used to denote an elder son of a particular family or an important person.
 The surname "Mayor" can also be derived from the Yiddish personal name "Meyer", which is derived from the Hebrew language  "Meir", which in turn means "enlightener".
Wallace is a Scottish surname derived from the Anglo-Norman French "waleis", which is in turn derived from a cognate of the Old English "wylisc" (pronounced "wullish") meaning "foreigner" or "Welshman" (etymology; see also Wallach and Walhaz).
 The original surname may have denoted someone from the former Kingdom of Strathclyde who spoke Cumbric, a close relative of the Welsh language, or possibly an incomer from Wales, or the Welsh Marches.
 The Kingdom of Strathclyde was originally a part of the Hen Ogledd, its people speaking a Brythonic language distinct from Scottish Gaelic and the English derived from Lothian.
 In modern times, in the 19th and 20th centuries, the surname has been used as an Americanization of numerous Ashkenazic Jewish surnames.

Question: Grosvenor is a surname derived from what member of a French Family that was also known as Hugh the French or Hugh the Wolf?
Answer: Hugh d'Avranches