Michael or Mikael. During the RTR shattering part, there is a reverse name: Le-ah-kh-eem = Mee-khay-el.
It seems thoroughly kiked. Very common name though. If your heart is set on it then maybe you could do what a lot of people do, and just shorten it to Mike.
If you want some ideas for pure Gentile names, I know some good ones. Marcus was one of the most common names in Rome, and it comes from the name of the God Mars. Gaius was also super popular. For females, common Roman names were Claudia, Cornelia, Cecilia, Livia. For more Greek, Petros seems to be the origin of Peter. Nick, Nicholas, and Nicole are all rooted in the name of the Greek Goddess of Victory, Nike. German version is Niklaus. If you want Scandinavian names, almost any variation of the word Ulf will do: Ulfred, Torulf, etc... there were many names with the word for wolf. Bjorn for bear. Sigurd, Signy. Torunn, Torhild. All very good, powerful Norse names.
I don't know as many Celtic ones so you would have to research for yourself. Beyond all of that, I don't have any other connections to European lands so I just don't have the interest. No blood connection.
For more modern names, some really good pure ones for girls are flower names like Rose, Lily, Jasmine. For males, Leo is a really good one with no corruption, and it's straight from the stars.