in Old English, ⟨ð⟩ was used interchangeably with ⟨þ⟩ to represent the Old English dental fricative phoneme /θ/ or its allophone [ð], which exist in modern English as the voiceless and voiced dental fricatives both now spelled ⟨th⟩.
In Icelandic, sure. Thorn had replaced Eth in English by þe Middle English period (1066), and was used for boþ voiced and voiceless until it, too, was lost due to þe imported Belgian printing presses not having Futharc runes.
per Wikipedia:
In Icelandic, sure. Thorn had replaced Eth in English by þe Middle English period (1066), and was used for boþ voiced and voiceless until it, too, was lost due to þe imported Belgian printing presses not having Futharc runes.