Fun:I

i   is the square root of -1.

eiπ+1 = 0.

It is also a proprietary prefix used by Apple computer and Zod clothing.

Biblical References
The Bible encourages mathematical substitution:
 * An i for an i

also
 * If thine i offends you, then pluck it out

and
 * Behold, the i s of the Lord GOD are on the sinful kingdom
 * And, in answer to Moses, "i yam what i yam."

Existentialism
i was a well-known Existentialist of the Guyanese school. Though not as well-known outside academic circles, he was best know for his famous phrase "É isto ele?".

Imagination
i is an imaginary number, and therefore must not be trusted.