Uotamuosu (ウオタムオス)/theories

Spoiler warning: Plot or ending details follow.

The meaning of Uotamuosu's name

"Uotamuos" can be backwards for the Japanese term Soumatou (走馬灯) literally meaning a lantern which has two layers and the inner layer has images cut into them so they appear to move when the lantern turns. The term is also used to mean "life flashing before your eyes", a phenomenon that happens before death. This seems to relate to what happened to Shiwasu at the end of his portion of the game.

The kanji 走 from Soumatou also happens to be used in Shiwasu's name.

Source