It means "On behalf of God and the constitution (or foundation--says Google translate)".
"Pro Deo et Patria" translates to "For God and country" in English.
Question contains spelling error; should be patria not parria Pro Deo et Patria For God and Country
Pro deo et patria (For God and Country)
Ar son Dé is na Tíre
Loras College's motto is 'Pro Deo Et Patria'.
The motto of Rikkyo University is 'Pro Deo et Patria-'.
The motto of American University is 'Pro deo et patria'.
Holderness School's motto is 'Pro Deo et Genere Humano'.
Witwatersrand Rifles Regiment's motto is 'Pro Deo et Patria'.
HKBP Nommensen University's motto is 'Pro Deo et Patria'.
The motto of Aklan Catholic College is 'Pro Deo Et Patria'.
It's Latin, and means "For God and Country".