FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

tis τίς — tis — probably emphatic of 5100; an interrogative pronoun, who, which or what (in direct or indirect questions):--every man, how (much), + no(-ne, thing), what (manner, thing), where (-by, -fore, -of, -unto, - with, -withal), whether, which, who(-m, -se), why.

see GREEK for 5100