Question: The title track of the album "We Free Kings" is a variation of a carol written by who?
Context: Domino is an album by Roland Kirk recorded and released in 1962, following up "We Free Kings", his 1961 breakthrough as a bandleader.  It was reissued in 2000 on Verve with bonus tracks featuring sessions with Herbie Hancock.  It includes Kirk's tribute to Thelonious Monk and Charles Mingus, "Where Monk and Mingus Live", in a medley with the former's "Let's Call This". Somewhere in the Night is the fourth studio album by American country music band Sawyer Brown.  Its title track was a single, as were "This Missin' You Heart of Mine" and "Old Photographs".  All three singles charted on the Hot Country Singles charts.  The title track, which is not related to Barry Manilow's hit song, was previously recorded by The Oak Ridge Boys on their 1981 album, "Fancy Free".  "Lola's Love" would later be covered by Ricky Van Shelton on his album "Love and Honor" and released as a single in 1994. Born Free is American artist Kid Rock's eighth studio album.  It released on November 16, 2010 with the title track being its lead single.  The album is a rock and roll collaboration produced by Rick Rubin featuring several high-profile artists such as T.I., Sheryl Crow, and Bob Seger.  This is Kid Rock's first album not to feature a Parental Advisory sticker and his first all-country album.  Kid Rock described it as "very organic blues-based rock and roll".  Cable network TBS used the title track, "Born Free", for its coverage of the 2010 Major League Baseball postseason.  It was announced on June 16, 2011 that "Born Free" was certified Platinum by the RIAA for shipments in excess of one million copies.  This gives Kid Rock his sixth Platinum album certification in the US.  A Michigan only promotion was released with the album.  It was a 4-song EP called "Racing Father Time". "We Three Kings" is a Christmas carol written by the Reverend John Henry Hopkins, Jr. "Free Spirit" is a 1966 song by blues session player Hermon Hitson (Philadelphia, 1943) which was mistakenly released as the title track of two albums of bootleg Jimi Hendrix recordings.  The title track of both Free Spirit bootleg albums, and other songs recorded in the same sessions, contain contributions by Lonnie Youngblood and Lee Moses, but no verified content by Hendrix himself.  A version of House of the Rising Sun is sometimes labelled as Hendrix, yet is Hermon Hitson. Songs is a solo album by American jazz pianist Matthew Shipp performing popular standards and spirituals, which was recorded in 2001 and released on the Italian Splasc(H) label.  "We Free Kings" is a Roland Kirk composition based on the Christmas carol "We Three Kings". Play ( ) is the thirteenth studio album by Taiwanese singer Jolin Tsai ( ).  It was released on November 15, 2014, by Warner Music Taiwan.  The album melds dancehall with bubblegum pop, breathtaking love songs with hilariously catty weirdness and euphorically catchy melodies with propulsive rhythms.  The album garnered critical acclaim and was declared as "easily the best album of the year".  The music video of the title track, "Play", became the most-viewed Chinese-language music video of 2014 on YouTube and thrust her into the international spotlight.  Nolan Feeney from "Time" magazine claimed the music video "the year's best pop music video."  The album has sold more than 85,000 copies in Taiwan alone, and made her the best-selling female singer of the year in Taiwan.  The title track, "Play", reached number 1 on the Hit FM Top 100 Singles of the Year.  The ninth track, "The Third Person and I", reached number 8 on the chart.  The album earned Tsai six Golden Melody Award nominations for Best Mandarin Album, Song of the Year, Best Vocal Recording Album, and three Best Music Videos, and she finally won for Best Mandarin Album and Best Vocal Recording Album.  The album also earned Tsai an MTV Europe Music Award nomination for Best Taiwanese Act.  The album also earned Tsai an Mnet Asian Music Award for Best Asian Artist. Faith is the third studio album by country artist Faith Hill, released in 1998.  Due to the success of the single "This Kiss" in Australia and the UK, the album was released under the title Love Will Always Win, featuring the title track, a new version of "Piece of My Heart" and two new versions of "Let Me Let Go", which replace "You Give Me Love", "My Wild Frontier", "Just to Hear You Say That You Love Me" and the original version of "Let Me Let Go".  In some countries, "It Matters to Me", the title track and hit single from Hill's second album, is also included as a bonus track.  "Better Days" was previously recorded by Bekka & Billy on their debut album.  "Love Will Always Win" was later issued as a single by Garth Brooks and Trisha Yearwood from Brooks' album "The Lost Sessions".  "I Love You" was originally recorded by Celine Dion for her album, "Falling into You".  The album was released on April 21, 1998 and received a six-time platinum certification from the RIAA.  As of October 6, 2003, sales were RIAA-certified at six million. We Free Kings is a 1961 LP by the jazz multi-instrumentalist Roland Kirk.  His group works through a set of bluesy post-bop numbers, including a highly regarded version of Charlie Parker's "Blues for Alice".  The title track, a Kirk composition, is a variation on the Christmas carol "We Three Kings". "We Three Kings", also known as "We Three Kings of Orient Are" or "The Quest of the Magi", is a Christmas carol that was written by John Henry Hopkins, Jr. in 1857.  At the time of composing the carol, Hopkins served as the rector of Christ Episcopal Church in Williamsport, Pennsylvania, and he wrote the carol for a Christmas pageant in New York City.  Many versions of this song have been composed and it remains a popular Christmas carol.
Answer: John Henry Hopkins, Jr.