furrypony
hopelessly sad filly
The only pony naming rules seem to be that
1. Contains at least 2 syllables.
2. Has a clear meaning related to their special talent.
3. The first letter, and each letter after each whitespace, are capitalized
and a few suggested rules that are not absolute:
4. Contains 0 or 1 whitespaces
5. Uses common words
6. Don't use hyphens.
There are more specialized traditions (second-part surnames, first-part surnames, matching surnames, deleting a whitespace to get from Flutter Shy to Fluttershy, etc) but none is very prevalent.
1. Contains at least 2 syllables.
2. Has a clear meaning related to their special talent.
3. The first letter, and each letter after each whitespace, are capitalized
and a few suggested rules that are not absolute:
4. Contains 0 or 1 whitespaces
5. Uses common words
6. Don't use hyphens.
There are more specialized traditions (second-part surnames, first-part surnames, matching surnames, deleting a whitespace to get from Flutter Shy to Fluttershy, etc) but none is very prevalent.