'Certain Man' in the Bible

Now there was a certain man of Ramathaim Zophim, of the hill country of Ephraim, and his name was Elkanah, the son of Jeroham, the son of Elihu, the son of Tohu, the son of Zuph, an Ephraimite.

Now a certain man of the servants of Saul was there that day, detained before the LORD; and his name was Doeg the Edomite, the best of the herdsmen who belonged to Saul.