Strong’s Greek
G1508 — ei
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
εἰ
ei — pronounced me {i may
from 1487 and 3361; if not:--but, except (that), if not, more than, save (only) that, saving, till. see GREEK for 1487 see GREEK for 3361
0 occurrences in the KJV.