Þið

As defined by A Concise Dictionary of Old Icelandic (Geir Zoëga):

þið

dual, ye two, = it, ið.

Possible runic inscription in Younger Futhark:ᚦᛁᚦ

Also available in related dictionaries:

This headword also appears in dictionaries of other languages closely related to Old Icelandic.

• Old Norse - Cleasby & Vigfusson Dictionary
• Old Norwegian - Johan Fritzner's Dictionary