Good suggestion, but I'm not asking the "how" either. I want to ask what the name of a particular diacritical mark is.

It's more the "what" than the "how", I suppose one could say.

Try asking there anyway. I don't think there is a more suitable site.

Should I post on their meta site first?

As a matter of interest do you have a link to an image showing the mark (together with a character). Also do you know what language it is?

Sure: charbase.com/images/glyph/235. Also, it's multi-lingual.

@SarahofGaia It's called a Diaeresis (also known as the trema or the umlaut). en.wikipedia.org/wiki/Diaeresis_%28diacritic%29

No, that's a common misconception. A diæresis (also spelled diaeresis or dieresis) and an umlaut are two distinct phonological events. A diæresis is placed over the 2nd vowel in a dipthong and signifies a syllable break; an umlaut is placed over the 1st vowel and signifies a pronunciation change. Thus, the character's name is context-dependent. See here‌​‌​.

I want to know what the name of the mark itself is, regardless of context. For example, the "." can be called either a full stop/period if used to terminate a sentence, or it can be called a decimal if used to separate the fractional digits from the integer digits of a numeral; yet it also has a context-independent name, i.e. a name for the mark itself, and that is a "baseline dot".

@SarahofGaia If you look at the history the "2 dots" was originally called a "trema". The name change occurred when it was given to different meanings (with different names). So the name of the "2 dots" tcould be said to be a Trema.

Interesting. What source did you get this from? I've heard the word "tréma" (also spelled "trema") many times, and I've suspected it may be the word I'm looking for, but I haven't been able to find any information about its meaning.

I am here.

Is this in real time or am I able to respond to your messages at my leisure?

Nevermind. I found the FAQ. Lol.

See the history section of the Wikipedia link. And collinsdictionary.com/dictionary/english/trema

Okay. Thanks.

Okay. So it seems to have been used in the same function at one point also as the diæresis. But prior to that it was just (seemingly) the name for the mark itself. I suppose one could call it that. Anyway, thanks!