San Diego Comic-Con 2008: Kubo created the Quincies as Ichigo's rivals, put them in white against the Soul Reapers' black kimono, gave them arrows because swords lose at long range, and named them on a pun: the Quincy cross has five points, like the Japanese five-pointed star; five points, quintet, Quincy. The German lexicon followed as the faction's flavor: Heilig Pfeil (holy arrow), Blut (blood), Vollstandig (complete), Sternritter (star knights), Schrift (letter, the rank-mark), Auswahl (selection), Wandenreich (the walled empire, the anime's official spelling).
The folk layer is the double name: the Quincies' kanji, metsukyakushi, monks of destruction, is ateji, characters chosen for meaning while the pronunciation kuinshii carries Quincy. Japanese readers thus hear the pun and read the menace simultaneously, and the localization flattened two jokes into one word. Fans also map the faction's visual grammar, the five-pointed cross, the long white coats, the selection purges, onto twentieth-century German history, a reading the series flirts with and never confirms.
Here is the claim that has occupied the fandom since 2012: Yhwach, the Quincy king, rearranges to YHWH, the Tetragrammaton. His powers map disturbingly well: he distributes pieces of his soul as letters, his knights drink his blood to receive their Schrift, he heals by touch, he declares himself son of the Soul King. Fan exegetes read the entire Thousand-Year Blood War as a passion narrative, the blood-drinking ritual as communion, the Auswahl as rapture, and the cross-shaped bows as the tell. Kubo, asked about everything else over the years, has never addressed the name.
The author explains the pun on five but not the name of God. Is the silence the answer, or is the fandom hearing a confession in a coincidence?