ᚦᚢᚱ versus ᛏᚢᛦ

At first glance, Þórr and Týr look as if they end the same way. Both end in r in normalized Old Norse spelling. But historically, they do not have the same kind of final r.

That is the key.

The Two Kinds of R

In Old Norse, the letter r can hide two different origins:

  • Ordinary r, inherited as an actual /r/ sound
  • R / ʀ, descended from an older Proto-Germanic z

This matters especially when writing names in Younger Futhark, because Younger Futhark had two different runes connected to these sounds: ᚱ reið for ordinary r, and ᛦ ýr for the older R / ʀ sound. The distinction reflects an older stage of the language, where Proto-Germanic final -z had not simply become an ordinary r yet.

The Short Answer

Þórr has rr because the name already contains an r before the old masculine nominative ending.

Týr has only one final r because its final r comes from the old nominative ending itself.

So the difference is structural:

  • Þórr = stem ending in r + nominative ending
  • Týr = stem + nominative ending only

That is why they behave differently.

Þórr: The Name Already Contains an R

The Old Norse name Þórr goes back to Proto-Germanic *þunraz, connected with the word for "thunder."

That older form already contains an r before the final ending:

*þunr-az

Break it apart:

  • *þunr- = the stem
  • -az = masculine nominative ending

Over time, the final -z became the special Norse R / ʀ, and later merged with ordinary r in much of Old Norse. But because the stem already ended in r, the result became rr in normalized Old Norse:

*þunraz → Þórr

So the double rr in Þórr is not decoration. It preserves the result of two historical elements coming together.

One r belongs to the stem.
The other comes from the old nominative ending.

Týr: The Final R Comes from Older Z

The name Týr comes from Proto-Germanic *Tīwaz, meaning "god" or "deity," and ultimately belongs to the same Indo-European family as words such as Latin deus.

The older form was:

*Tīw-az

Break it apart:

  • *Tīw- = the stem
  • -az = masculine nominative ending

Unlike Þórr, the stem does not already end in r.

So when the old final -z developed into Norse R / ʀ, that final sound became the only final r in the Old Norse form:

Tīwaz → Tīwaʀ → Týr

That final r is historically not the same as an ordinary stem r. It is the old z ending, transformed by sound change.

Why This Matters for Runes

In normalized Latin spelling, both names end with r:

  • Þórr
  • Týr

But in runic thinking, especially for Viking Age Younger Futhark, you must ask where the sound comes from.

Younger Futhark had only 16 runes, but it preserved an important distinction between ᚱ reið and ᛦ ýr. The ýr rune was used for the special R / ʀ sound that came from older Proto-Germanic z.

That means:

  • Ordinary r → usually ᚱ
  • Older final R / ʀ from Proto-Germanic z → usually ᛦ

So a practical Younger Futhark rendering would treat them differently:

  • Þórr → final sound is tied to the stem-r cluster, so normally ᚱ
  • Týr → final sound comes from older -z, so ᛦ

This is why blindly writing every Old Norse r with the same rune is wrong.

The Real Rule

Do not ask: "Does the word end in r?"

Ask: "Where does that r come from?"

That is the whole issue.

  • If the r is an ordinary inherited r, use ᚱ.
  • If the r comes from older Proto-Germanic z, especially in old nominative endings, use ᛦ.

This is why Þórr and Týr are not the same case.

Final Takeaway

Þórr has a doubled rr because the name already had a stem-final r, and the old masculine nominative ending was added after it.

Týr has a final r because its older form ended in -z, which became the special Norse R / ʀ sound.

In Latin letters, both look like r.
In historical runic logic, they are not the same.