▁the ▁orig ins ▁of ▁the ▁mad hol ic ▁community . ▁His ▁older ▁sister ▁was ▁married ▁to ▁Y i ▁Se ung - h un , ▁the ▁Korean ▁who ▁was ▁first ▁bapt ized ▁as ▁a ▁Catholic ▁in ▁Be ij ing ▁in ▁ 1 7 8 4 ▁and ▁played ▁a ▁leading ▁role ▁in ▁the ▁early ▁years ▁of ▁the ▁Church ' s ▁growth . ▁The ▁oldest ▁of ▁Je ong ▁J ae - won ' s ▁sons , ▁Y ak - h ye on , ▁was ▁married ▁to ▁a ▁sister ▁of ▁Y i ▁By e ok . ▁Another ▁daughter , ▁from ▁a ▁third ▁marriage , ▁later ▁married ▁H w ang ▁Sa - ye ong ▁( 1 7 7 5 – 1 8 0 1 ), ▁author ▁of ▁the ▁not orious ▁Sil k ▁Let ter . ▁Das an ' s ▁older ▁brother , ▁Je ong ▁Y ak - j ong ▁( August inus ) ▁was ▁the ▁leader ▁of ▁the ▁first ▁Catholic ▁community ▁and ▁one ▁of ▁the ▁first ▁vict ims ▁of ▁the ▁pur ge ▁launched ▁against ▁Southern ers , ▁but ▁especially ▁against ▁C athol ics , ▁in ▁ 1 8 0 1 , ▁after ▁the ▁sudden ▁death ▁of ▁King ▁Je ong jo . ▁ ▁In ▁ 1 7 8 9 , ▁Y un ▁Ji - ch ung , ▁one ▁of ▁the ▁first ▁bapt ized ▁and ▁a ▁cousin ▁to ▁Das an ▁on ▁his ▁mother ' s ▁side , ▁had ▁gone ▁to ▁Be ij ing ▁and ▁received ▁confirm ation . ▁Rome ▁had ▁forb idden ▁C athol ics ▁to ▁perform ▁ancest ral ▁rit