Strongbow is a brand of dry cider

Cider

Cider or cyder is a fermented alcoholic beverage made from apple juice. Cider varies in alcohol content from 2% abv to 8.5% abv or more in traditional English ciders. In some regions, such as Germany and America, cider may be termed "apple wine"...

 manufactured in England by H.P. Bulmer. Popular since it was launched in 1962, it is the best selling cider in the world, and its sales account for more than 20% of all the cider sold in the UK. It is also in a strong commercial position in Ireland, where the name has historical relevance.
Strongbow is named after the Cambro-Norman

Cambro-Norman

Cambro-Norman is a term used for Norman knights who settled in southern Wales after the Norman conquest of England in 1066. Some historians suggest that the term is to be preferred to Anglo-Norman for the Normans who invaded Ireland after 1170 — many of whom originated in Wales. However, the term...

 knight Richard de Clare

Richard de Clare, 2nd Earl of Pembroke

Richard de Clare, 2nd Earl of Pembroke , Lord of Leinster, Justiciar of Ireland . Like his father, he was also commonly known as Strongbow...

, later Earl of Pembroke

Earl of Pembroke

Earl of Pembroke is a title created ten times, all in the Peerage of England. It was first created in the 12th century by King Stephen of England. The title is associated with Pembroke, Pembrokeshire in West Wales, which is the site of Earldom's original seat Pembroke Castle...

, nicknamed "Strongbow" for relying heavily on Welsh

Wales

Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...

 archers during campaigns in Ireland

Norman Invasion of Ireland

The Norman invasion of Ireland was a two-stage process, which began on 1 May 1169 when a force of loosely associated Norman knights landed near Bannow, County Wexford...

, where at the time the Irish had few bows and relied on javelin

Javelin

A Javelin is a light spear intended for throwing. It is commonly known from the modern athletic discipline, the Javelin throw.Javelin may also refer to:-Aviation:* ATG Javelin, an American-Israeli civil jet aircraft, under development...

s.