'Identity' in the Bible

I will take the blood from their mouthsAnd their detestable things from between their teeth [those repulsive, idolatrous sacrifices eaten with the blood].Then they too will be a remnant for our God,And be like a clan in Judah,And Ekron will be like one of the Jebusites.

but he will [deny his identity and] say, ‘I am no prophet. I work the ground, because a man sold me as a slave in my youth.’