To flow down
Jourdon is a variant spelling of Jordan, which is derived from the Hebrew name Yarden. It refers to the Jordan River, the primary river in the Holy Land where Jesus was baptized. The name became popular in Europe after Crusaders brought back water from the river to baptize their children.
Less common today
Jourdon isn't in the latest US Top 1000. It last peaked at #5,445 in 1995.
African American author of a famous 1865 letter to his former master
US births per 5-year period, 1990βpresent (SSA data).