Was Jack Harkness known as the Face of Boe while he was Jack Harkness?

when he was a child he lived in the Boeshiem Peninsula. He was the first person to be recruited as a Time Agent, making him famous. Everyone called him the Face of Boe..

The reference was made through Dr Who. It was never actually confirmed that Jack Harkness was the Face of Boe. However, Russel Davies left the the answer to the viewer to establish the identity as in the closing sequence David tenant (Dr Who) said " No, No, surely not" and looked back at the glass class that house the Face of Boe