sponsor

One who assumes responsibility for another person or a group during a period of instruction, apprenticeship, or probation.

One who vouches for the suitability of a candidate for admission, as to an organization.

A legislator who proposes and urges adoption of a bill.

One who presents a candidate for baptism or confirmation; a godparent.

One that finances a project, event, or organization directed by another person or group, such as a business enterprise that pays for radio or television programming in return for advertising time.