Spell My Name with an "S"/Oral Tradition

Examples of in  include:


 * Nobody seems to know whether "Xenu" or "Xemu" is the correct spelling. At least, nobody who's willing to talk about it.
 * The name of Óðinn/Odin/Oden/Woden/Wotan is spelled differently in basically every Germanic language. This is in part due to Norse having a distinct letter ð for the voiced "th" sound, transliterated in modern English sometimes as th and sometimes as d, and in most Scandinavian languages as dh or d. And the Romans called him Mercury
 * There's also Freyja/Freya/Freia/Freja/Frøya/Freyia.
 * God. He's OK with being called God, since it's clear that He's the only one to which a Christian or Jew would refer, but... YHVH or YHWH? Is the name more closely Anglicized as Yahweh, Jehovah, or something in between? It's not supposed to be pronounced. Nobody but the high priest knew how the word is pronounced, and even modern religious Jews misspell it on purpose because they're not allowed to write it. There is some debate about what exactly the word means, but it's likely related to the root 'to exist'.
 * The way I heard it, it is supposed to represent the sound of breathing. Something about the symbolism of all living things praising his name at all times or something.
 * Arthurian Legend: Guinevere can be Guenever, Gwenwhyfar, Guanhumara (!), or Wenneuereia (Flat What). Similarly for Isolde / Iseult / Isolt / whatever.
 * It can also be Jennifer or Ginevra.
 * The obscure Catholic Saint Winwaloe. Or possibly Guénolé, Winwallus, Guingalois, or Vinguavally. Or maybe Ouignoualey, or Bennoc, or dozens more.
 * The name of the legendary hero of Greek mythology can be spelled either as Herakles or Heracles. That Other Wiki seems to prefer the latter, as does the Glory of Heracles video game series.
 * There are multiple accepted ways to write "Hanukkah" in Roman letters.