According to the IUPAC systematic nomenclature for elements with atomic number $Z > 100$, the name is derived from the numerical roots of the digits in the atomic number, followed by the suffix '-ium'.

For atomic number 119:

1. The root for the digit 1 is un.
2. The root for the digit 1 is un.
3. The root for the digit 9 is enn.

Combining these roots with the suffix: un + un + enn + ium = Ununennium. The symbol would be Uue .