Coat of arms of O'Neill

The blazon

vert, two lions ramp, combatant, ar. supporting a sinister hand, couped, gu. ; in base a fish of the second. — Crest, out of a ducal coronet or, a dexter arm, embowed, in armour, ppr. grasping a sword, the blade waved, of the first. 0 Neylan, [Ireland,] sa. two unicorns, statant, in pale, ar. — Crest, a dexter hand, couped below the wrist, holding a sword. 0 JYeylan, [Ireland,] gu. a dragon, statant, vert. — Crest, a dexter hand, couped below the wrist, holding a sword erect, on the point a boar s head, fesseways, . . .

A blazon is the description of a coat of arms in the technical language of heraldry. The drawing comes from that text, and from nothing else.