I need context to answer definitively but apostrophes show possession but there are also possessive pronouns (Mine, His, Hers, Yours, Its, Ours, Yours, Theirs), possessive adjectives (My, Your, His, Her, Its, Our, Your, Their), personal pronouns:This is either about the (subject you or them the object, I, Me, You, He, Him, She, Her, It, We, Us, Them, They) and lastly I would say the Plurality (something Plural also indicates or shows possession).
"I've learned to get along with my brother ever since my father left the family business to him and me"
In the future, when presented with a grammar question like this, just think, "Would it be 'my father left the business to he?'" It would make sense to say, "my father left the business to him" :)