Quintin is said of quin, that be five, and of teneo, tenes, that is to hold, and is as much to say as holding five things. He held first in himself honesty of life, faith catholic, purity and cleanness of conscience, true preaching and crown of martyrdom.
A bit more cerebral than the more hard nosed Declan, Quinn would likely be a doctor or a professor at the university.
There are few different ways to go if Pat does dare to take the Q route:
QUENTIN: Latin name meaning "fifth." Variants and diminutives include Quent, Quenten, Quenton, Quint, and Quintin.
QUIGLEY: Irish/Gaelic name meaning either "distaff" or "mussed hair."
QUILLAN: Irish/Gaelic name meaning "cub."
QUIMBY: From Old Norse place name meaning "estate of the woman."
QUINCY: Old French name meaning "Estate of the fifth son."
QUINTIN: see Quentin.
QUINLAN: Irish/Gaelic name meaning "fit; shapely; strong."
QUINN: Irish/Gaelic name meaning "intelligent."
This corner, of course, would advise to go with the baptismal name of Quintin, after the great saint, with the less affected Quinn as a nickname.
About St. Quintin: