Strong's G1437 — ἐάν (conditional)
ean (eh-an') cond.
1. in case that, provided that, etc.
{Often used in connection with other particles to denote indefiniteness or uncertainty}
[from G1487 and G302, a conditional particle]
KJV: before, but, except, (and) if, (if) so, (what-, whither-)soever, though, when (-soever), whether (or), to whom, (who-)so(-ever) 
Root(s): G1487, G302 
See also: G3361 
Hebrew root: ἄν
Occurrences: 336