I once found this nice table where there were all the terminations for different cases and genders for all possessive pronouns, and they were the same for all pronouns, which is nice. So it´s like you have: "mein-, dein-, sein-, ihr-, sein-, unser-, eur-, ihr-" and then the terminations for nominative: "-er, -e, -es, -e", for accusative "-en,-e,-es,-e" and dative "-em,-er,-em,-en". So that´s all you need to know for possessive pronouns and I have them in a nice table :) I have noticed these terminations also work for other words, such as "welch". Is it safe to assume this? For which words do these terminations work?