Auglaize County is a county located in the state of Ohio. According to the 2010 census, it has a population of 45,949, which is a decrease of 1.4% from 46,611 in 2000. It is included in the Wapakoneta, Ohio Micropolitan Statistical Area. Its county seat is Wapakoneta.
The county is named for the Auglaize River. Some sources say it is a corruption of the French description of the clay (glaise) water (eau), whereas others say it comes from a Native American word meaning 'fallen timbers'.
Another weak possibility according to Lakehistory.info is that it could have been the French term la glace [*aux glaces?], which means 'mirror', or 'ice' ['at the ices'?].
There is something to be said for the unattested eau glaise 'clay water' (as if 'dirty water'), like attested terre glaise 'clay soil', but both Ramsey and Stewart agree that Auglaize (and variants, implying "*aux glaises") is American French for 'at the lick(s)', literally 'at the clays', where wild beasts came to lick salt and minerals from the soil, and fulfilling the lacuna in standard French for a "salt lick." The spelling "glaize" is archaic (as in Cotgrave's French-English dictionary of 1611). In addition, in Arkansas there is a creek and mountain Glazypeau, from French glaise à Paul 'Paul's lick'. The assumed indigenous American (Algonquian) "'fallen timbers' or 'overgrown with brush'" has no support without any attested etymons supplied and would not match phonetically in the case of Shawnee.