Jeal-ous, eiddigeddus; amhëus
Jel-ly, gludgawl, sew
Jeop-ard, peryglu, enbydu
Jew-el, gem, em, glain, tlws
Jew-ess, Iuddewes
Jock-ey, marchogwr: hergwthio
Join-er, cyssylltwr, asiedydd
Jour-nal, coflyfr; rhestrydd
Jour-ney, taith: teithio
Joy-ful, llawen, gorfoleddus