This can be just a coincidence, but Roman twin
Romulus rapted Hora (Hersilia); ON "twin" Freyr rapted Gerd. This can be a PIE
root *g^Her-, linked to a sort of bright goddess? The Leukippides Phoibe and
Hilaira, specially Phoibe, had names associated to "shine". Of course I can't
say that Gerd's father Gymir was a Sun-God.
Max Mueller tried to link kharites with haritas,
the bay horses of Sun chariot, but haritas < *g^Hel- "yellow".
And Phoibe (<*g^HwoigWa:) could be
cognate to Balto-Slavic words for "star", like zvezda and
cia.