Ruth Metzger

In old Hollywood, actors would sometimes show up in one or two pictures, then disappear, leaving behind no clue as to how they came to stand briefly in the spotlight. One such was Ruth Metzger (dates unknown).

IMDb states that she appeared in Honky Tonk (1929), a Sophie Tucker musical, and in The Rogue Song. No specific character is named in either case.

Presumably someone had a basis for inputting this information, but it is difficult to be certain that Ruth Metzger actually existed.