When I spell my name, I usually say it's "Marie" with "ke" behind it. (My name is Marieke, I'm from Holland). Is this correct? I just think of it as the first letter of a word is in front so the following letters are "behind", however my husband disagrees. I could well be wrong as English is not my first language. Can you help?
I'd prefer followed by rather than behind:
It's Marie followed by K E.
The suggestion by outrightmental of then is reasonable, but there's a chance that then might be misheard as enn (i.e. the letter N).
Behind is about visibility. In your case, use followed by ke or ke at the end would be better.
From a native Chicagoan living in Brooklyn, NY, I recommend addressing an English speaker with:
It starts with Marie, M - A - R - I - E then K- E.
Note how I used the word "then" in my delivery. So you can rely on the listener to know how to spell "Marie" as you mention in your question. Nice name, btw!
I would say, "My name is Marieke. It is spelled like Marie and then a K and E at the end."
I am assuming two things. That in your culture the name Marie is common and it is pretty much always spelled M A R I E (and it is pronounced the same). And that you give them your full name first so that they have context.