Do any sources name the three aettir of the Younger Futhark, or is the naming carried over from the Elder Futhark by modern convention?

Why it is open. The atlas holds three Aett rows and all three are Elder Futhark. The division of the sixteen rune Younger Futhark into three families is structurally real: cipher rune inscriptions encode a rune as a family number plus a position within that family, which cannot work without an agreed division of the row. The live rune ordering here fits the partition usually reported, six, five and five, because Hagall stands at position 7 and Tyr at position 12, exactly where the second and third families would begin. The naming is what could not be established. A pass on 2026-07-27 found only popular and unsourced material, which does not agree with itself: the same three names are given over groups of eight, four and four, of six, six and four, of six, five and five, and of eight, eight and eight, and none of it carried a locator that could be checked. Deriving the rows from the rune ordering alone was refused as inference presented as attestation, so nothing was seeded.

What would resolve it. A reading of the standard runological literature on cryptic or cipher runes, for example Michael Barnes, Runes: A Handbook, 2012, or Klaus Duwel, Runenkunde, 2008, both already held as sources here, settling two things. First, whether the medieval evidence for the ordering of the families in cipher runes, which counts them in reverse so that the Tyr family is numbered first, is reported with family names attached or only with numbers. Second, whether the names Freyr, Hagall and Tyr for the Younger Futhark families occur in any Old Norse or Icelandic manuscript witness, or whether they enter print only in the modern revival, applied backwards from the Elder Futhark. A dated witness naming any one of the three would settle it and the rows could be seeded citing it. A demonstration that none exists would settle it the other way, and the division would stay a structural fact about cipher runes rather than three named entities.

Field. Runology; Old Norse philology; palaeography of Icelandic runic manuscripts