The VI & last pope to have this name reigned from 1963 to 1978
He was the first pope to take the pontifical name of "John" upon 
election in .... the death of Pope Pius X. Radini-Tedeschi's last words to Roncalli 
were "Angelo, ..... Cardinal Giovanni Battista Montini, who later became Pope 
Paul VI,... [DOC] [TLE] Year of the Three Popes: 1978 - EWTN.com [PAR] The not unexpected death of Pope Paul VI on August 6th, 1978, was ... by the 
election of the "Smiling Pope," John Paul I.