Haha Nae - I'm Naomi too and I get Neeomi, Niomi, Leonie, Fiona etc. It's not a hard name - it's phonetic too so it's not hard. So yeah I just go by Nai as well.
I love the Sean than was pronounced Seen. There's an actor Sean Bean and DP always calls him Seen Been as he thinks his parents were cruel to name him that given his surname and the different pronunciations of the similar spellings - that would be very confusing to a child learning to read and spell!

