I like the
Zeph part, but I prefer
Zephyr to Zephan, which I'd pronounce ZEF-ən. Some middle names:
Zephan
AlexanderZephan
AmadeusZephan
AnthonyZephan
AristotleZephan
AugustusZephan
AureliusZephan
BrooksZephan
CharlesZephan
ConstantineZephan
EvanderZephan
JackZephan
JamesZephan
MercuryZephan
SethZephan
ThaddeusZephan
TheodoreZephan
Theseus