Kittim is a people or geographic designation descended from Javan in the Table of Nations, not a narrated individual person.
Biography
Genesis 10 and 1 Chronicles 1 list Kittim among the descendants of Javan. Later biblical usage applies the name to maritime western lands or peoples; Isaiah, Jeremiah, Ezekiel, and Daniel use Kittim in geographic or prophetic settings. The term is therefore better understood corporately than as an individual biography.
Biblical Significance
Kittim belongs in the Table of Nations and biblical geography. This record should be treated as a people-group designation rather than supplied with an invented personal life.