Its a very 'American' name to me. I had never met a Kendra before until I went to the US last year and I had quite a few little girls at Summer Camp with the name. I haven't met or heard of a Kendra since I left the US either.
I don't really think a lot about it at all- its just a nothing name to me. It is fine as a name but its not something I'd particularly like to see used at the same time.