a hanger-on

a hanger-on

a person who spends time with rich or important people, hoping to get an advantage (usually plural) Wherever there is royalty, there will always be hangers-on.
References in classic literature ?
The thoughts of living on, year after year, at the Grove - a hanger-on upon mamma and Walter, a mere cumberer of the ground (now that I know in what light they would regard it), is perfectly intolerable; I would rather run away with the butler.
Todd's daughter was fully eighteen when her father first made his pile; so there isn't really anything impossible in her having a hanger-on in low life; or even in her hanging on to him, as I think she must be doing, to judge by the lantern business.