As far as I know, there are some cognates about German and English personal pronouns, such as:
German ich and English I
German du and English thou
German wir and English we
German ihr (you pl.) and English ye
But I am confused with German sie (she, they) and ihr (her, their), because each word contains more than one meaning, and the cognates in English are unknown at least to me.
What is the Proto-Indo-European etymology of the German sie and German ihr?