Tomrair mac Ailchi

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Tomrair mac Ailchi, or Thormod/Thorir Helgason, was the Viking jarl and prince who reestablished the preexisting small Norse base or settlement at Limerick as a powerful kingdom in 922 overnight when he is recorded arriving there with a huge fleet from an unknown place of departure. His ancestry is uncertain but he evidently did not belong to the Uí Ímair dynasty who only a few years before had reestablished themselves in the Kingdom of Dublin, of which Tomrair, the first King of Limerick, would immediately make himself the chief rival.

An earl is a member of the nobility. The title is Anglo-Saxon in origin, akin to the Scandinavian form jarl, and meant "chieftain", particularly a chieftain set to rule a territory in a king's stead. In Scandinavia, it became obsolete in the Middle Ages and was replaced by duke (hertig/hertug/hertog). In later medieval Britain, it became the equivalent of the continental count. However, earlier in Scandinavia, jarl could also mean a sovereign prince. For example, the rulers of several of the petty kingdoms of Norway had the title of jarl and in many cases they had no less power than their neighbours who had the title of king. Alternative names for the rank equivalent to "earl/count" in the nobility structure are used in other countries, such as the hakushaku of the post-restoration Japanese Imperial era.

A prince is a male ruler ranked below a king and above a duke or member of a monarch's or former monarch's family. Prince is also a title of nobility, often hereditary, in some European states. The feminine equivalent is a princess. The English word derives, via the French word prince, from the Latin noun princeps, from primus (first) and capio, meaning "the chief, most distinguished, ruler, prince".

Norsemen historical ethnolinguistic group of people originating in Scandinavia

The Norse people or Norsemen were a group of Germanic people who inhabited Scandinavia and spoke what is now called the Old Norse language between c. 800 and 1300 AD. The language belongs to the North Germanic branch of the Indo-European languages and is the predecessor of the modern Germanic languages of Scandinavia. In the late eighth century Norsemen embarked on a massive expansion in all directions. This was the start of the Viking Age.


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    Primary sources

    The Annals of Clonmacnoise are an early 17th-century Early Modern English translation of a lost Irish chronicle, which covered events in Ireland from pre-history to AD 1408. The work is sometimes known as Mageoghagan’s Book, after its translator Conall the Historian.

    <i>Annals of the Four Masters</i> chronicles of medieval Irish history

    The Annals of the Kingdom of Ireland or the Annals of the Four Masters are chronicles of medieval Irish history. The entries span from the Deluge, dated as 2,242 years after creation to AD 1616.

    John ODonovan (scholar) Irish academic

    John O'Donovan, from Atateemore, in the parish of Kilcolumb, County Kilkenny, and educated at Hunt's Academy, Waterford, was an Irish language scholar from Ireland.

    Secondary sources
    <i>Ériu</i> (journal) journal

    Ériu is an academic journal of Irish language studies. It was established in 1904 as the journal of the School of Irish Learning in Dublin. When the school was incorporated into the Royal Irish Academy in 1926, the academy continued publication of the journal, in the same format and with the same title. Originally, the journal was published in two parts annually, together making a volume, but parts slipped further apart after Volume III. Articles are written in either Irish or English.

    Four Courts Press is an independent Irish academic publishing house, with its office at 7 Malpas Street, Dublin 8, Ireland.

    Regnal titles
    Preceded by
    King of Limerick
    Succeeded by