Naming conventions for naming files that would start with a dot usually
You could try some Unicode 'dot equivalent' like
· [Unicode U+0087 UTF-8 C2 B7] or
․ [Unicode U+2024 UTF-8 E2 80 A4] or
⠠ [U+2820 UTF-8 E2 A0 A0]

Try the Character Viewer in System Prefs > Keyboard > Keyboard. Type 'dot' &amp; see what may work