The six descendants of Shecaniah were Shemaiah and his sons: Hattush, Igal, Bariah, Neariah, and Shaphat.
Jewish Publication Society of America Version (JPS1917) - 1 Chronicles 3:22 >And the sons of Shecaniah: Shemaiah; and the sons of Shemaiah: Hattush, and Igal, and Bariah, and Neariah, and Shaphat, six.