Thainus (Anglice: tháin; cf. thainus) est dux militaris Hobbitorum Comitatus in Tolkeniense Terra Media. Officium creatum est post exitum Regni Arnoriani, anno 1979 Tertia Aetate.

• Bucca
• (Tunc fuerunt 11 thaini sine nominibus notis)
• Gorhendad Oldbuck
• Isumbras Took I
• (Thaini octo, cum Isengrim I, Isumbras II, Ferumbras I, et Paladin I inter alios)
• Isengrim Took II
• Isumbras Took III
• Ferumbras Took II
• Fortinbras Took I
• Gerontius Took
• Isengrim Took III
• Isumbras Took IV
• Fortinbras Took II
• Ferumbras III Took
• Paladin II Took

• Peregrin Took I
• Faramir Took I

• Comitatus (Terra Media) atque Hobbitus