C. Kunin to A.Sklyarenko: I've always assumed that Disa was somehow related to the underworld, but never did the research. I don't think that Disa could be related to Desdemona, and here other possible origins [snip] Two of the sources for the name are found in Wikipedia (in blue): Disa was the heroine of a Swedish legendary saga, which was documented by Olaus Magnus, in 1555. It is believed to be from the Middle Ages, but includes Old Norse themes. This Disa also makes her appearance in early Scandinavian literature and art: The Encyclopedia Britannica refers to the "historical comedy Disa" [snip] Further, the saga has been treated by Johan Celsius in the prose drama Disa (1687), which was an adaptation of Messenius' stage play in verse. Later it was adapted by Johan Gabriel Oxenstierna in the poetic letter Disa (1795), and in the fourth song of the poem Skördarne (1796). In the so-called Disasal [Disa room] on the second floor of the castle of Venngarn, there are eight large paintings depicting scenes from Disa's saga. Additionally Dis turns out to also mean a type of Nordic sprite (reminiscent of Pnin's mermaid-Rusalka) [snip]: By the way, another Scandinavian meaning for Dis is simply "queen." EDNote--PS: on Scandinavian Disa, see also Dieter Zimmer's summary in his Guide (http://www.d-e-zimmer.de/eGuide/Lep2.1-D-E.htm) at Erebia disa. -SB.
Jansy: Dis is related to "God/Gods" in Latin, since "deus" (m. god) is irregular. It appears in Dative and Ablative plurals (deïs, diïs, dïs).
Cf. www.thelatinlibrary.com/101/grammarforms.pdf