'Certain Man' in the Bible

There was a certain man from Zorah, from the tribe of the Danites, and his name [was] Manoah; his wife [was] infertile and did not bear children.

There was a certain man from Ramathaim Zophim, from the hill country of Ephraim, whose name was Elkanah the son of Jeroham, the son of Elihu, the son of Tohu, the son of Zuph, an Ephraimite.

When a certain man saw [it], he told Joab, and he said, "Look, I saw Absalom hanging in the oak tree!"

A certain man from the sons of the prophets said to his fellow countryman, "By the word of Yahweh, please strike me." But the man refused to strike him.

Now a certain man drew the bow {at random} and struck the king of Israel between the soldering of [his] breastplate armor. Then he said to the chariot driver, "{Turn around}; get me away from the [war] camp, for I am wounded."