I am researching the HAGLER family who immigrated to the U.S. from the Austro-Hungarian Empire at the end of the 19th century and the beginning of the 20th century. This family is Jewish. I note that there are other HAGLER families whose origin seems to be German or Swiss. I am also aware that there are Black HAGLER families. Could there be a connection among these disparate groups? Does anyone know where and when the HAGLER name first appeared? I think that all people who have the HAGLER name on their genealogical tree would be interested in exploration of the name itself.