Fosterage

[…] it was worthy of extraordinary note, how that upstart family of the Kings of Pergamus had raised it selfe to marvellous greatnesse, in very short space, from the condition of meere slavery: whereof a principall cause was, the brotherly love maintained by them, with singular commendation of their pietie. Neither was Philip ignorant of these examples; but is said to have propounded the last of them, to his owne children, as a patterne for them to imitate. Certainely hee had reason so to doe: not more in regard of the benefit which his enemies reaped by their concord, than in remembrance of the tender fosterage, wherewith King Antigonus his Tutor had faithfully cherished him in his minoritie.

Source: wiktionary

There still remains in the Islands, though it is passing fast away, the custom of fosterage. A Laird, a man of wealth and eminence, sends his child, either male or female, to a tacksman, or tenant, to be fostered.

Source: wiktionary

A youth passed in solitude, my best years spent under your gentle and feminine fosterage, has so refined the groundwork of my character, that I cannot overcome an intense distaste to the usual brutality exercised on board ship […]

Source: wiktionary

1660, Robert May, The Accomplisht Cook, London: Obadiah Blagrave, 5th edition, 1685, I do acknowledg my self not to be a little beholding to the Italian and Spanish Treatises; though without my fosterage, and bringing up under the Generosities and Bounties of my Noble Patrons and Masters, I could never have arrived to this Experience.

Source: wiktionary