※ Disclaimer: I only got into the fandom recently, and these are mostly personal associations that naturally came to me while catching up on the story. I'm not a professional in linguistics, religious studies, mythology, anthropology, history, philosophy, theology, or any related field, so just take this for fun.
※ I did a quick search and didn't find any discussions in China from exactly the same angle, so I boldly decided to write this.
※ Keywords: Sephiroth's name; Supernova; the Ancient Hebrew three-consonant root S-P-R; the Quadrivium; the cosmological order of the crystalline spheres
※ In a sentence: There should be a semantic, theological, cosmological, and intellectual-historical connection between the origins of Sephiroth's name and the origins of the Supernova ability.
※ How I arrived at this: Tracing the origins of Sephiroth's name, its etymology should lead back to the Semitic triconsonantal root *S-P-R, which also appears as S-P-R in Classical Hebrew. Words formed from this root in the canon primarily mean counting (associated with mathematics, and also with God) and book (associated with language and writing, as well as directly with God, and therefore with wisdom and revelation). Looking further at the close ties between mathematics, astronomy, and cosmological theology in the development of the crystalline-sphere cosmological order system, we can connect Sephiroth's name to the Supernova ability.
Theme: The connection between Sephiroth's name and the Supernova ability
At my last resort, I discovered that the ancient Hebrew language was not displayed at all...