Diodorus Siculus, 41, 42, 325. Dionysus, rites of, 410. Dis Pater, 51, 120, 252, 383. Dissull the Giant, 348-349. Diwrnach the Gael, the cauldron of, 346, 349. Dobhar, king of Sicily, 96, 98, 102, 103. Doctrine of the transmigration of souls, 36, 37. Domnann, Fir, _i.e._ men of Domnu. See Fir Domnann. Domnu, a goddess, mother of the Fomors, 48, 70, 112; meaning of the name, 48; gods of Domnu, 48, 70; men of Domnu, 70. Dôn, the British equivalent of the Gaelic Danu, 44, 252, 260, 268, 269, 273, 295, 308, 310, 316; euhemerized into a king of Dublin, 372-373. Donn, son of Milé, 126-131, 246. “Donn’s House”, 246. Dormarth, the hound of Gwyn son of Nudd, 257. Dowth, 137-138. Dragon, Red, of Britain, 378; White, of the Saxons, 378. “Dragon-mouth”, a lake called, 141. _Dream of Rhonabwy_, the, 260, 312, 337, 338. Drogheda, 137. Drowes, river, 110. Drudwyn, the whelp of Greid the son of Eri, 347. Druidism, the religion of the Celts, 35, 43; possibly non-Aryan in origin, 36; in Gaul, 34; derived from Britain, 35; suppressed by the Romans, 399, 400. Druids, 18, 33-37, 84, 111, 115, 151, 179, 180, 182, 188, 202, 399-401, 411, 412, 417; origin of the name, 33; in Gaul, 34; in Britain, 35; human sacrifices of the druids, 37, 412; the druids of Brude, king of the Picts, 401. Drumcain, an old name for Tara, 126. Dublin, 66, 372. Duke of the Britains, the, 313. Dulachan, 247, 248. _Dul-dauna_, the, 237. Dun Cow, Book of the. See Cow. Dundalk, 177. Dundealgan, 177, 181, 188, 189. Dún Scaith, 175-176. _Dux Britanniarum._ See Duke of the Britains. Dwynwen, Saint, 388. Dyfan, Saint, 386. Dyfed, or Demetia, a province of South Wales, 273, 278, 279, 281, 282, 286, 298-301, 303, 304, 309, 310, 394. Dylan, a British god, 261, 262, 322, 335, 360, 364, 371.