"position or responsibilities of a steward," mid-15c., from steward (n.) + -ship. Specific ecclesiastical sense of "responsible use of resources in the service of God" is from 1899.
Entries linking to stewardship
steward n.
Old English stiward, stigweard "house guardian, housekeeper," from stig "hall, pen for cattle, part of a house" (see sty (n.1)) + weard "guard" (from Proto-Germanic *wardaz "guard," from PIE root *wer- (3) "perceive, watch out for").
Used after the Conquest as the equivalent of Old French seneschal (q.v.). Meaning "overseer of workmen" is attested from c. 1300. The sense of "officer on a ship in charge of provisions and meals" is first recorded mid-15c.; extended to trains 1906. This was the title of a of high officers of the state in early England and Scotland, hence meaning "one who manages affairs of an estate on behalf of his employer" (late 14c.). Meaning "person who supervises arrangements" at a meeting, dinner, etc., is from 1703.
The Scottish form (with terminal -t attested from late 14c.) is reflected in Stewart, name of the royal house descended from Walter (the) Steward, who married (1315) Marjorie de Bruce, daughter of King Robert. Stuart is a French spelling, attested from 1429 and adopted by Mary, Queen of Scots.
-ship
word-forming element meaning "quality, condition; act, power, skill; office, position; relation between," Middle English -schipe, from Old English -sciepe, Anglian -scip "state, condition of being," from Proto-Germanic *-skepi- (cognates: Old Norse -skapr, Danish -skab, Old Frisian -skip, Dutch -schap, German -schaft), from *skap- "to create, ordain, appoint," from PIE root *(s)kep-, forming words meaning "to cut, scrape, hack" (see shape (v.)). It often forms abstracts to go with corresponding concretes (friend/friendship, etc.).