This genealogy begins with the arrival of the Antoine Leche and his wife Catherine von Hausen in Louisiana in 1759. It lists the family through ten generations to the modern day including nearly 4,000 family descendants. The project began with current family members building a family tree online. When my father, the author of this work, met the family at a Leche reunion in the late 1990s, he agreed to take the work already begun and research it into what you have here today. He worked on the research for a decade. He began editing in earnest after he retired in 2010, but passed away in 2011 with the first four generations complete. The rest of the work is complete if unedited, but provides complete information on most of the thousands of descendants listed. As it fell to me upon his death to publish the work, I present it as a complete family list without additional editing. It is a remarkable piece of research, combining my father's passion for genealogy and family history.