'Armor bearer' in the Bible

Then said Saul to his armor-bearer, Draw thy sword, and thrust me through therewith; lest these uncircumcised come and abuse me. But his armor-bearer would not; for he was greatly afraid. So Saul took a sword, and fell upon it.

And when his armor-bearer saw that Saul was dead, he fell likewise on the sword, and died.

Zelek the Ammonite, Naharai the Berothite, the armor-bearer of Joab the son of Zeruiah,