unclassified
voiced repetition mark (hiragana)
A hiragana iteration mark indicating that the previous kana is repeated with voicing (dakuten). Rare in modern standard writing but may appear in names, older texts, or stylistic contexts.
「いすゞ」の「ゞ」は、「す」を濁点付きで繰り返す記号です。
The ゞ in いすゞ is a symbol that repeats す with a dakuten.