William Leslie Cazneau (October 5, 1807 – January 7, 1876) was a Texas pioneer who is credited with having buried the Alamo Heroes with full military honors.
He was assigned the burial of the remains of the Alamo heroes, as well as the guarding of Mexican prisoners on Galveston Island.
In 1850, after his marriage to Jane McManus, he established the townsite of Eagle Pass to extend his trading enterprises into Mexico.
In 1861, he partnered with Joseph W. Fabens to colonize formerly enslaved people in Santo Domingo and later was involved in other equally unsuccessful endeavors.
He continued to make his home in the West Indies except for brief intervals until his death at his Jamaica estate on January 7, 1876.