<Ul> <Li> Panait Cerna (1881--1913), Romanian writer </Li> <Li> J.D. Cerna, American actor </Li> <Li> Ismael Cerna (1856--1901), Guatemalan poet </Li> <Li> Ricardo Alfonso Cerna (1956--2003), Guatemalan national </Li> <Li> Vicente Cerna y Cerna (1815--1885), president of Guatemala </Li> </Ul> <Li> Panait Cerna (1881--1913), Romanian writer </Li> <Li> J.D. Cerna, American actor </Li> <Li> Ismael Cerna (1856--1901), Guatemalan poet </Li>

Where does the last name cerna come from