As it turns out, neither of my publishers wants there to be confusion between David Isaak and David Whoever, so we're back on the pen name trail again.
So, what are the names of some pens? David Sheaffer? David Cross? David Biro? David Bic? Or, to take a page from Len Montblanc-Meisterstück (nee LC Tyler), David Montblanc? Other pen possibilities:
David Yard-O-Led is appealing, but perhaps a bit distracting.
There are also the generic foreign-language terms for pen:
but they all sound a touch, well, foreign.
Quiller? Penner? Scribner/Scrivener?
I've always admired Anne Rice's pen name for her S&M porn, AN Roquelaure, which is a slightly archaic French term for "cloak". And perhaps I could get somewhere with "Henshin" which sounds valid enough but is Japanese for "disguise". Anyone have any obscure and interesting words for "disguise," "cloak", or "mask"? (No, David Persona doesn't seem to work.)
Anagrams are always good, but I think "Isaak" has too many vowels. I can't turn it into anything. Maybe I could adopt Iain Banks' first name and add that into the mix: Iain Isaak = aaa iii k n s. If nothing else, I could form a Hawaiian place name, like Ka'a'ani'isi. (Not quite right--Hawaiian has no "s".)
Though "Sanders" was good enough for Pooh, it's a little generic.
At the moment, I'm leaning towards a tip of the hat to JRR Tolkein: the name Isaak isn't to be mentioned outside The Shire, so I'll go traveling by the name of Underhill. David Underhill. DT Underhill.
Or, since so many fantasy writers have three first names (JRR Tolkein. George RR Martin, MFW Curran), maybe I need three initials: A.B.C. Biro. David R.R. Montblanc. I.M.A. Yard-O-Led.
I always liked George Harrison's pseudonym when he played on the Cream song Badge: L'Angelo Misterioso. But it's been done.
Or perhaps the name is Bond. James Bond. That's got a certain ring to it.