🔼The name Elishua in the Bible
There's only one Elishua mentioned in the Bible and he is one of the sons of David who were born to him in Jerusalem (2 Samuel 5:15, 1 Chronicles 14:5). It seems plausible that this Elishua is the same as the Elishama mentioned in 1 Chronicles 3:6.
🔼Etymology of the name Elishua
The name Elishua consists of two elements. The first part is אל (El), the prominent Canaanite deity whose name became applied to the God of Israel, or the common abbreviation of Elohim, the genus God:
The second part of our name probably comes from the verb שוע (shawa'), meaning to cry or ישע (yasha'), meaning to save or be rich and free:
For a meaning of the name Elishua, NOBSE Study Bible Name List reads God Is Salvation. Jones' Dictionary of Old Testament Proper Names proposes God The Rich or God Of Crying. And BDB Theological Dictionary suggests God Is Salvation or God Is Opulence.