You mean to end in 'a', right? E is also a vowel and all. (100% not being sarcastic, just trying to be clear) I am personally fascinated by those name variants and how some sounds are kept while others are changed, me being a writer+linguistics nerd+history buff has got me unhealthily obssessed with names, I personally find George one of the most fascinating names in that regard because 'g' can do funny things and that results in those variants starting with /g/(hard G, as in gift), /dʒ/ (English j sound), /ʒ) (French j sound), and /j/ (English y sound) across the globe. Like isn't it fun that Jerzy (your language, Polish) and Georg (German) can sound so different but actually originate from the same name?