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A bind rune or bindrune (Icelandic: bandrún) is a Migration Period Germanic ligature of two or more runes. They are extremely rare in Viking Age inscriptions, but are common in earlier (ProtoNorse) and later (medieval) inscriptions.

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There are two types of bind runes. Normal bind runes are formed of two (or rarely three) adjacent runes which are joined together to form a single conjoined glyph, usually sharing a common vertical stroke (see Hadda example below). Another type of bind rune called a samestave rune, which is common in Scandinavian runic inscriptions but does not occur at all in AngloSaxon runic inscriptions, is formed by several runic letters written sequentially along a long common stemline (see þ=r=u=t=a=ʀ= =þ=i=a=k=n example shown above). In the latter cases the long bind rune stemline may be incorporated into an image on the rune stone, for example as a ship's mast on runestones Sö 158 at Ärsta and Sö 352 in Linga, Södermanland, Sweden, or as the waves under a ship on DR 220 in Sønder Kirkeby, Denmark.
On some runestones, bind runes may have been ornamental and used to highlight the name of the carver.