Iuddewiaeth, n. Judaism
Iuddewig, a. pertaining to Jews
Iw, n. that extreme
Iwbwb, n. a hollo, a cry
Iwerddon, n. Ireland, Erin
Iwin, n. a frantic one: a outrageous, frantic
Iwrch, n. a roebuck
Iwrth, prep. by, in opposition
Iyrchaidd, a like the roebuck
Iyrchell, n. a young roe