1 Chronicles 7:39 lists the sons of Ulla: Arah, Haniel, and Rezia. This verse is part of a genealogical record, simply naming these three individuals as descendants within the tribe of Asher.
The book of 1 Chronicles was written to document the family lines of Israel, especially after the exile, helping the people remember their heritage. In this section, the chronicler is listing out the descendants of Asher, one of the twelve tribes of Israel. The verse does not add narrative details or stories, but it preserves the names of Ulla’s sons as part of the official record.