ゝ

• ゞ — voiced

ゝ 

1. (dated) An iteration mark denoting the repetition of the previous hiragana.

   さゝき ― Sasaki

• (Japanese ligatures and scribal abbreviations) 〆(しめ) (shime), 𪜈(とも) (tomo), ゟ (yori), ヿ (koto), 𬼀(して) (shite), 〼(ます) (masu), ヶ (“graphical abbreviation for 箇”), 々 (“iteration mark”), ゝ (“iteration mark for hiragana”), ヽ (“iteration mark for katakana”) 〱 (“iteration mark for multiple kana”),