Geni does not allow isolated trees to be merged into the World Family Tree, or other trees.
public profile
Son of Tribe Members ., Simeon Father of Shelumiel . Brother of Salu .; Maachah .; Hori . and Ammihud .
There are commentaries that claim that ancestor of Judith, Salamiel son of Sarasadai, is the same person as Shelumiel son of Zurishaddai.