robert | Etymology, origin and meaning of the name robert by etymonline

Bob a familiar shortening and alteration of the masc. proper name Robert. British slang phrase Bob’s your uncle “everything’s all right” is attested by 1937. It seems to echo the old use noted in the 1725 “Canting Dictionary,” which reports ” Bob … signifies Safety, … as, It’s all Bob, i. e. All is safe, the Bet is secured.” bright dobbin Hob

https://www.etymonline.com/word/Robert