Thomas Oliphant (1799–1873) was a prominent Scottish lyricist, musician, and antiquarian whose English translations and adaptations of traditional melodies significantly shaped modern choral music and Christmas carol traditions. Born into an aristocratic family in Perthshire, Scotland, Oliphant initially pursued a career in commerce as a member of the London Stock Exchange. However, his profound passion for music led him to abandon the financial sector to dedicate his life to musical scholarship. He became an influential member of the Madrigal Society of London, eventually serving as its secretary for over three decades, where he championed the revival of Renaissance vocal music.

Oliphant’s most enduring legacy lies in his skill as a translator and lyricist who successfully adapted foreign and traditional folksongs for English-speaking audiences. In 1862, he wrote the ubiquitous English lyrics to the Welsh winter carol "Nos Galan," creating "Deck the Halls with Boughs of Holly," which became an international holiday standard. His extensive collections, most notably Welsh Melodies and La Musa Madrigalesca, bridged the gap between historical regional folksongs and mainstream church and secular choirs. His name remains firmly embedded in comprehensive hymnodies and tune databases due to his lyrical pairings with traditional Welsh airs like Llwyn Onn ("The Ash Grove"), which later served as the musical foundation for popular Christian hymns.

Beyond his creative writing, Oliphant made foundational contributions to musical bibliography and archiving as an antiquarian. In 1841, he was commissioned by the British Museum to catalog its vast, disordered collection of manuscript and printed music, a monumental task that laid the groundwork for modern musical preservation in the United Kingdom. He spent his later years producing English versions of classical masterpieces, including Beethoven's Fidelio and works by Mozart and Handel, ensuring they were accessible to British choral societies. Oliphant passed away in London in 1873, leaving behind a rich archive of musical scholarship and festive verse that continues to be sung worldwide.