Not a full list by any means list.
Taken from notes made over many years of research in the writing of "This Mighty Isle".
These listed, are the ones that raised my imagination.
Proper recognition to authors and book titles given at end,but Not in any order or detail.
My thanks to all these Authors.

"Dragons" Drew the chariot of Ceriddwen.

"Dyrnwyn" Sword of Rhydderch Hael.

"Divitiacus" Arch Druid on Anglesey.Llaniden.

"Dinas Affaron"Also known as "Emrys"City Magical City.[City of the Higher Powers]

"Dyvwall Moelmud"One of the Three Pillars of the Isle of Britain. [Laws,Maxims and Customs]

"Dion Fortune" A wonderous woman whom i wouldst to have loved to have met.The Glastonbury Lady.[Quote: The ignorant and impure person gazeth upon the face of nature,and it is to him Darkness of Darkness.But the inlightened and illuminated gazeth theron and seeth the features of the Goddess/God.Be ye far from us,o ye profane,while we adore the Goddess/God manifest in nature].

"Druid House" : Symbolized as the great Trithithian of Stonehenge. [See Odes,People beyond the north-west wind]

"Druids" Known to the Greeks,200 bce "Sotion" mentions them in Gaul,but previous to that Briton

"Dylan Ap Ton"One of the Twins of Arianrhod.[Llew Llaw Gyffes] the Other.(Ocean,Son of Wave)

"Dead Sea Scrolls" Community at Qumran,Early church.Transation of Qumran text-["Sect of the new Covenant"who leader known as "Teacher of Rightousness"was held to be the Messiah.][if one takes the new Testament-the Gospels and the Acts of the Apostles,as In controversial Historical fact,it is impossibal to do scholary justice to the Dead Sea Scrolls.] [Christian Doctrine,in effect Dictates the agenda.]

"Dux Brittanorum"[Leading General of the Britons]Constantine the Pale,set up the Dux Brittanorum in 296c.e.

"Drynemetum" Sacred Oak grove.

Book of Druidry(Ross Nichols)Mythology of the British Isles(Geoffrey Ashe)Ancient Faith of Britain(Dudley Wright)Druid Way(P Carr-Gom)Druid Renaissance(P Carr-Gom)The Encyclopedia of Celtic Wisdom(Caitlin and John Matthews)Glastonbury,Avalon off the heart(Dion Fortune)The White Goddess(Robert Graves)Druidry(Philip Shallcrass)Avalonian Quest(Geoffrey Ashe)Druid Animal Oracle(Philip and Stephanie Carr-Gom)Arthurian Myth and Legend(Mike Dixon-Kennedy)The Voice Within the Wind(Greywind) The Druid Sourse Book(John Matthews)Gods of the Celts(Miranda Green)The Lore of the Bard(Arthur Rowen)The Celtic Year Book(John King)Pagan Pathways(Emma Restall-Orr)Act of God(Philips)Bloodline of the Holy Grail(Laurence Gardner)Dead Sea Scrolls Deception(Richard Leighand Michael Baigent)Magi(G Ash)Witches,Druids and King Arthur(Ronald Hutton)Living Druidry(Emma Restall-Orr)The mystical Qabalah(Dion Fortune)Secrets of the Druids(John Matthews)