A son of Saul. (1 Samuel 14:49; 31:2) Elsewhere correctly given Malchishua.
Melchishua
Melchishua is a name you could easily read past. He was one of the sons of King Saul, listed beside Jonathan and Abinadab in the family tree of 1 Chronicles 9. Only one moment gives him more than a name: when the Philistines pressed hard on Saul, they “slew Jonathan, and Abinadab, and Malchishua.” The Bible spells it two ways, Melchishua in one place and Malchishua in another. It is a quiet reminder that Saul’s last battle on Mount Gilboa cost him three sons in a single day. The account is in 1 Samuel 31.
5 verses
1 Samuel
Now the sons of Saul were Jonathan, and Ishui, and Melchishua: and the names of his two daughters were these; the name of the firstborn Merab, and the name of the younger Michal:
And the Philistines followed hard upon Saul and upon his sons; and the Philistines slew Jonathan, and Abinadab, and Malchishua, Saul's sons.
1 Chronicles
And Ner begat Kish, and Kish begat Saul, and Saul begat Jonathan, and Malchishua, and Abinadab, and Eshbaal.
And Ner begat Kish; and Kish begat Saul; and Saul begat Jonathan, and Malchishua, and Abinadab, and Eshbaal.
And the Philistines followed hard after Saul, and after his sons; and the Philistines slew Jonathan, and Abinadab, and Malchishua, the sons of Saul.
From Smith's Bible Dictionary
William Smith, 1884