'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, and Ephraimite.

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