I'm currently studying Icelandic. Right away at one of the first steps I found a bit of difficulty and I wonder if any of you might be able to help me as the question might be answered based on any highly inflected language. The doubt regards the use of pronouns:

Below you'll be able to see the Personal and Possessive pronouns that constitutes the Icelandic language, and with them I also put the noun cases that would be also part of the scheme: (For the sake of the example I'll only use first person singular pronouns)

Personal pronouns:

Case Pronoun

Nom ég

Acc mig

Dat mér

Gen mín

Possessive Pronouns:

Case Pronoun

Nom minn

Acc minn

Dat mínum

Gen míns

My question is: how can I differentiate the usage of the personal genitive pronoun with the possessive genitive pronoun? Does anybody knows of any example (In Latin or German, or even in English if you can figure a way out) or anywhere I could find an explanation?