Quinn comes from the Irish surname O Cuinn, often traced to a root meaning "wisdom" or "counsel" -- originally a family name long before it became a given name. As a unisex choice today, it tends to carry a sense of directness: someone whose judgment is trusted without much ceremony around it.
The dominant star being in the Midheaven, exalted or in its domicile and taking part of the ascendant. - Picatrix (Andalusia, ~1000.AD)