ASCII Character фCyrillic small letter ef
Kha or Ha (Х х; italics: Х х) is a letter of the Cyrillic script. It looks the same as the Latin letter X (X x X x), in both uppercase and lowercase, both roman and italic forms, and was derived from the Greek letter Chi, which also bears a resemblance to both the Latin X and Kha. The Cyrillic letter Kha was derived from the Greek letter Chi (Χ χ). The name of Kha in the Early Cyrillic alphabet was хѣръ (xěrŭ). In the Cyrillic numeral system, Kha had a value of 600.