Dyeus and Deiwos review and question

Greetings all,

Back from a prolonged absence (shifting states, new jobs, wedding,
etc) And so like the proverbial bad penny, I turn up again in hopes
of furthering my knowledge of PIE connections.

Below is a list I have gathered from multiple sources. In most cases
I must confess to not knowing how the particular cultural expression
developed, (aka not sure of the soundlaws responsible for the
derivation) and am simply taking the opinion of more knowledgable
people for granted.

--------

ENTRY: dyeu-
DEFINITION: To shine (and in many derivatives, "sky, heaven, god").
Zero-grades *dyu- and *diw-.
I. Basic form *dyeu-
II. Noun *deiwos, god, formed by e-insertion to the zero-grade
*diw- and suffixation of (accented) -o-.


Dyeus group:
Greek Zeus
Roman Jovis -> Juppiter
Vedic Dyaus Pitar

* Are there any German, Celtic, Baltic, Slavic, Hittite, or
Iranian/Avestan forms of the Dyeus group??

------------

Deiwos group:
Germanic Tiwaz Germanic *deiwos > *ti:waz (regular soudlaws *d > t,
*ei > i:, *o > a, *-s > -z). Goth. Tyz, Eng. Tiw, Norse Tyr, Also
OHG Zio, OHG ziari (shining, splendid), OS tir (glory)
Latin Deus
Slavic Div
Vedic Devas
Avestan Daeva
Old Irish Dia "god" & Welsh Duw
Baltic Dievas: Lith. dievas, Ltv. dievs, Old Prussian deiws
Hittite Sius & Siwatt (*diw-os > *siw-as > Sius & Siwatt)

Luwian Tiwat and Palaic Tiyaz ??


If anyone could clarify any errors, answer the above question, or
fill in any missing sound laws, I would greatly appreciate it!

Sincerely,
Aydan