The genealogical family tree of the family Grush with roots in Pennsylvania and Illinois as far back as the eighteenth century, with biographies, obituaries, stories, and some photos. This particular branch of Grush is centered on the lineage of Joseph to Christopher to Philip to Isaac, settled or born in Lancaster County, Pennsylvania, then migrating to Ogle County in Northern Illinois. The origin of the family was of French Huguenots escaping religious persecution to Germany and then Holland to come to the new world. The book should be of value to researchers.