Francis La Fontaine, or Topeah (Miami: "frost on leaves" ) (1810 – 1847) was the last principal chief of the unified Miami tribe, and oversaw the split into the Western and Eastern Miami tribes. La Fontaine's grandfather, Peter LaFontaine, was a French trader from Fort Detroit who came to Kekionga in 1776. He arrived with Charles Beaubien, and both men married Miami women and declared their loyalty to the Miami. In 1828, at age 18, La Fontaine became the chief of his Miami village. The same year, he married Catherine, the daughter of Chief Jean Baptiste Richardville. Richardville and La Fontaine worked together on a treaty in 1840 which removed half of the Miami nation to an area west of the Mississippi River.