Well, I never expected anyone, even myself, to use a name that unwieldy!
It just seems that, long though I have loved Tolkien's works, every time I try to join a discussion group -- even when it's just forming -- someone's always beaten me to the punch for names I would like that came from Tolkien's world. I think Ibrin is the most natural shortening of it -- although if one cares to get into Tolkienian semantics, "ibri" (V. "silver") would be the root of that part of the name. But having grown up in a large family, I sometimes answer to "hey, you" too
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Thank you all for the warm welcome.