Webster's Revised Unabridged Dictionary · 1913

Sirrah

Sirrah , noun

[Probably from Icelandic sīra, from French sire. See Sir.]

A term of address implying inferiority and used in anger, contempt, reproach, or disrespectful familiarity, addressed to a man or boy, but sometimes to a woman. In sililoquies often preceded by ah. Not used in the plural.
Ah, sirrah mistress. — Beau. & Fl
Go, sirrah, to my cell. — Shakespeare