It's not Amar though. Amr is a very common Egyptian name. And it's literally sounds like ah-mr. There's no vowel you can put between m and r to make that sound.

What about ‘i’?

I’m not suggesting this gets done - the persons name is their name.

A system I use has a 42 character limit for the last name, at that was passed last week with a 47 character last name.

Different name, Amir starts with an Allif