Word Study
Sirrah
CIDE DICTIONARY
Sirrah, n. [Probably from Icel. sīra, fr. F. 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. Beau. & Fl. [1913 Webster]
"Go, sirrah, to my cell." [1913 Webster]
OXFORD DICTIONARY
Sirrah, n. archaic = SIR (as a form of address).
Etymology
prob. f. ME sire SIR
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