Kristoffer71

It is true that the word ihr means many different things. What I find helpful is to buy a grammar book with exercises. Perhaps you already have one and are using it? So when you get used to ihr meaning you in plural as in "Marie und Hans, ihr kommt morgen oder?" by having practiced this extensively, then it is less of a problem to get used to ihr also meaning something else, for example "to her", as in "Ich gebe ihr das Geld". So to distinguish the two ihr already mentioned you can see that the first one is used as a subject. Here ihr are the ones who are coming (Marie and Hans). The second ihr again is used as an object. Whom am I giving the money? To her (ihr). So the context in the sentence gives away which ihr we are talking about. And as you mentioned there are even more ihr words. But extensive grammar practicing will get you there. What also helps is to not try to arrive to a "this word always means this". Rather look at every situation separately and you will see what ihr means in that context.

It would be Viele meiner Verwandte arbeiten auch hier. So leave the n out at the end of Verwandte. It is the genitive case, so no additional n is added in plural. I would like to say though that this is more of a written language form. If your intention is to say this to somebody verbally it would be more natural with: Viele von meinen Verwandten arbeiten auch hier.