Erilaz or Erilaʀ is a Migration period Proto-Norse word attested on various Elder Futhark inscriptions, which has often been interpreted to mean "magician" or "rune master", viz. one who is capable of writing runes to magical effect. However, as Mees (2003) has shown, the word is an ablaut variant of earl, and is also thought to be linguistically related to the name of the tribe of the Heruli, so it is probably merely an old Germanic military title (see etymology below).
Etymology
This word is likeliest the Proto-Germanic ancestor of Anglo-Saxon eorl (Modern English earl) and its relatives, meaning "man, warrior, noble". The word erilaz is likely a derivative of *erǭ sb.f. "fight, battle", thus the interpretation "one who fights, warrior", though it has also been connected to *arô sb.m. "eagle".
Historical instances: Latin: Heruli (dating from around 250 AD onwards) Greek: Eruloi (dating from around 250 AD onwards) Runic: Erilaz (dating from around 200 AD - 400 AD)
Inscriptions
Lindholm "amulet"
The Lindholm "amulet" (DR 261 $U) is a bone piece found in Skåne, dated to the 2nd to 4th centuries. The inscription contains the word Erilaz.
Funen shaft
The Kragehul I (DR 196 U) spear-shaft found in Funen that bears the inscription: […] […] Which is interpreted as "I, the earl of Āsugīsalaz, am called Muha," followed by some sort of battle cry or chant ("gagaga"). Āsugīsalaz contains ansu-, "god", and gīsalaz, "pledge". Muha may either be a personal name, or a word meaning "retainer" or similar. The runes of gagaga are displayed as a row of three bindrunes based on the X-shape of the g rune with side-twigs attached to its extremities for the a. A similar sequence gægogæ is found on the Undley bracteate.
Other items
Strängnäs stone: …rila͡z
Bracteates Eskatorp-F and Väsby-F have e[k]erilaz = "I [am] a Herulian" Bratsberg clasp: ekerilaz Veblungsnes:ekirilazwiwila Rosseland (N KJ69 U): ekwagigazirilaz Järsberg Runestone (Vr 1): ekerilaz By (N KJ71 U): ekirilaz The Etelheim clasp has mkmrlawrta read as ek erla wrta "I, Erla, wrote this"; Runic e and m are similar to each other.
Notes
References
Mees, B. (2003). "Runic 'erilaR'", North-Western European Language Evolution (NOWELE), 42:41-68. Orel, Vladimir (2003). A Handbook of Germanic Etymology. Leiden: Brill. pg. 205. . Plowright, S. (2006). The Rune Primer, Lulu Press. ; book review