Save Type Surname (from nickname) Usage English Pronounced Pron. /ˈmʌn.deɪ/ [key·simplify] Meaning & History Denoted a person for whom this was a significant day, often the day they would pay their feudal fees. Related NamesDetails Rootsmona + dægVariantMondySame SpellingMonday 1, Monday 3 Categories days, days of the week, English nouns, foundling names, time periods, word names