Also, is it unknown if anyone was at fault for the collision: the city, the train engineer, the person in charge of track maintenance, or the bus driver. (philadelphiapersonalinjuryblog.com)
Not having a credit card and not having much else for that matter makes you an unknown and an unknown is a risk in the eyes of lenders. (money.stackexchange.com)
While his reputation is high among the discerning — particularly among other writers — his limited output has kept him unknown among most of the reading public. (religion-online.org)