Jen (Jeon, Cheon) Youngkyu (Yeong-kyu)
b. 26 May 1988
Qualified in 2005. Currently 7p.
Jen's KBA page is broken, so we can't get his promotion dates from it. Go4Go suggests that he reached 2p in 2007, 3p in 2008 and 4p in 2009. Korean Wikipedia seems to say that he made 5p in 2011, 6p in 2014 and 7p in 2018. Go4Go agrees with these dates.