Tutelary

When a minor is involved, tutelary powers frequently accompany powers of attorney.

Source: wiktionary

[I]n the firſt of Henry the ſixth, the Company of Armorers in London were incorporated by the name of the fraternite of Saint George: which queſtionleſſe reflected on him, though not as Patron ſpecially of this Realme of England, yet as the tutelarie Saint of militarie men. Elſe to what purpose ſhould the Armorers, whoſe trade is onely deſtinate to the uſe of Souldiers, be made a Corporation by his name, and under his protection.

Source: wiktionary

The iſland [of Lemnos] was conſecrated to Vulcan, whom the inhabitants worſhiped as their tutelary god. They were believed to have been the firſt blackſmiths, which gave the poets the occaſion to feign, that Vulcan, when he was thrown down from heaven, fell in the iſland of Lemnos, where he built his forge.

Source: wiktionary

In our Athenian constitution, if we are weakly governed or capriciously, which hardly can happen, the mischief is transitory and reparable; one year closes it; and the people, both for its satisfaction and its admonition, sees that no corruption, no transgression, in its magistrates, is unregarded or unchastized. This, of all advantages, is the greatest, the most corroborative of power, the most tutelary of morals.

Source: wiktionary