Hmm. Something's not right here. Perhaps he has a case of Stolen Valor.
His full name (as the Bureau of Prisons will cheerfully confirm, not to mention enough legal filings to choke John Edwards) is Jonathan Keith Idema. He has always gone by "Keith" to friends (?) and family and the world at large. Starting with Afghanistan, he went all candle-stein with "Jack."
In Robin Moore's "Hunt for Bin Laden" he is referred to by about three variations on his name.
d.o.l.
Criminal Number 18F