The name Rubinstein and its variant Ravenstein pun with רבן rbn raban for “lord” & “master” (a variant of Rabbi), and השתנה hštnh hi-shtanah for “disguising oneself” (see Stein).
Hebrew, Aramaic rbn = lord; h-štnh = disguised
רבן rbn :
lord, master; chief, head man; abbot; scholar, teacher
— Aramaic (CAL)
השתנה hštnh :
Hith.: disguised himself, was changed, was different
— Hebrew (Klein)