Frederick Oakeley in the context of Roman Catholic Diocese of Westminster

"O Come, All Ye Faithful", also known as "Adeste Fideles", is a Christmas carol that has been attributed to various authors, including John Francis Wade (1711–1786), John Reading (1645–1692), King John IV of Portugal (1604–1656), and anonymous Cistercian monks. The earliest printed version is in a book published by Wade. A manuscript by Wade, dating to 1751, is held by Stonyhurst College in Lancashire.

The original four verses of the hymn were extended to a total of eight, and these have been translated into many languages. In 1841, the English Catholic priest Frederick Oakeley translated the hymn into English as "O Come All Ye Faithful", which became widespread in English-speaking countries.

John Francis Wade (1 January 1711 – 16 August 1786) was an English hymnist who is usually credited with writing and composing the hymn "Adeste Fideles" (which was translated as "O Come All Ye Faithful" in 1841 by Frederick Oakeley). The authorship is disputed, with 13th-century cardinal St. Bonaventure and King John IV of Portugal being proposed as alternative composers, although the earliest known manuscripts of the hymn discovered from 1946 all bear Wade's signature. Others argue for John Reading (c. 1645 – c. 1692) or anonymous Cistercian monks.

Wade fled to France after the Jacobite rising of 1745 was crushed. As a Catholic layman, he lived with exiled English Catholics in France, where he taught music and worked on church music for private use.