|Easton's Bible Dictionary|
(1.) One of the spies sent out by Moses to search the land (Numbers 13:4). He represented the tribe of Reuben.
(2.) One of David's sons (1 Chronicles 14:4; 3:5, "Shimea;" 2 Samuel 5:14).
(3.) A Levite under Nehemiah (11:17).
Int. Standard Bible Encyclopedia
sha-mu'-a, sham'-u-a (shammua`):
(1) The Reubenite spy (Numbers 13:4, Samouel, and other forms).
(2) One of David's sons (2 Samuel 5:14 1 Chronicles 14:4, Sammous). In 1 Chronicles 3:5 he is called "Shimea."
(3) A Levite (Nehemiah 11:17); he is called "Shemaiah" in 1 Chronicles 9:16. (4) The head of a priestly family (Nehemiah 12:18); a contemporary of Joiakim.
Shammua (6 Occurrences)
Numbers 13:4 These were their names: Of the tribe of Reuben, Shammua the son of Zaccur. (WEB KJV JPS ASV BBE DBY WBS YLT NAS NIV)
2 Samuel 5:14 These are the names of those who were born to him in Jerusalem: Shammua, and Shobab, and Nathan, and Solomon, (WEB KJV JPS ASV BBE DBY WBS YLT NAS NIV)
1 Chronicles 3:5 and these were born to him in Jerusalem: Shimea, and Shobab, and Nathan, and Solomon, four, of Bathshua the daughter of Ammiel; (See NIV)
1 Chronicles 14:4 These are the names of the children whom he had in Jerusalem: Shammua, and Shobab, Nathan, and Solomon, (WEB KJV JPS ASV BBE DBY WBS YLT NAS NIV)
Nehemiah 11:17 and Mattaniah the son of Mica, the son of Zabdi, the son of Asaph, who was the chief to begin the thanksgiving in prayer, and Bakbukiah, the second among his brothers; and Abda the son of Shammua, the son of Galal, the son of Jeduthun. (WEB KJV JPS ASV BBE DBY WBS YLT NAS NIV)
Nehemiah 12:18 of Bilgah, Shammua; of Shemaiah, Jehonathan; (WEB KJV JPS ASV BBE DBY WBS YLT NAS NIV)