The Irish Annals were a set of documents written in Monasteries throughout Ireland starting around 600 AD. Like the Bible, the oldest versions are lost, but we have copies made for a period of 1,000 years until the last and most complete was finished in 1636. Before, and even after that, many of the copies were destroyed due to the occupation of the country by foreigners.

This page is a collection of the entries that refer to the surname Hoy in its various forms which changed through time. The earliest is for the year 1019 and the last for 1208. Before that, the surname did not exist, but the genealogy of the family is well documented and it is these men who are recorded in the Annals.

The death of Muireadhach in 489 is considered the first reliable event, but not the date. Saint Patrick lived with him and later with his sons Eochaidh and Cairell.

The earliest spelling of the surname is Ua hEochadha where Ua means 'descendant of'. Eochadha and later Eochaidh (Owey) were a popular a king's names (our Eochaidh died in 1004) meaning Steedlike. "The genealogy of all the Dál Fiatach is filled with the name Eochu (Horse-God or Horse-Like), and its modern form (Eochaidh)" - from IrishTribes.com. Eochu is cognate with the latin word for horse, equus.

In the census of 1651, O'Hoy is listed as a principle surname in mid-Louth, while in late 18th century baptisms, it is always written Hoy. Starting after 1800, it came to be written Hoey which is now the most common in Ireland.

There are eight Annals listed here. For all of them, the earlier the date, the more accurate the entry. The entries before the time of Christ were attempts by the monks to join Irish history with Jewish and Greek history and cannot be taken as true, but may have some worth.