Does anyone know if this could be Brendan Behan's signature?

I bought a copy of Brendan Behan's New York on eBay ages ago and never noticed that it has a signature on the inside that would appear to say "Brendan" with a couple initials or something before it. I've found a few examples on-line and it's certainly not spot on but it also appears that his signature changes a lot over time. I'm guessing I won't be able to post a picture here but any thoughts would be appreciated