The surviving examples of Proto-Norse are all runic inscriptions in the Elder Futhark. Runic used an unrelated Futhark sequence, which was later simplified. The Yr rune is a rune of the Younger Futhark. Both the Anglo-Saxon runes and the Younger Futhark consistently use the simplified three-stroke version. His rune row has 24 letters, like the Elder Futhark. It bears 18-20 runes of the Elder Futhark on three lines. They were engraved in Old Norse with the Younger Futhark. Its name "yr" ("yew") is taken from the name of the Elder Futhark Eihwaz rune. It is notable for its listing of each of the runes in the elder futhark. However, it does bear some resemblance to the othala rune in the Elder Futhark. They cover the same set of staves as the other Younger Futhark alphabets. The highest concentration of Elder Futhark inscriptions is in Denmark. The lifetime of the Younger Futhark corresponds roughly to the Viking Age. Ansuz is the conventional name given to the "a"-rune of the Elder Futhark, . The names are, however, not directly attested for the Elder Futhark themselves.