What was the nationality of the person who wrote Variations on a Theme by Tchaikovsky?
Russian
Title: Cornelius Lyons
Passage: Cornelius Lyons (c. 1670 - c. 1740) was an Irish harper and composer of harp tunes.  He was the harper of the Earl of Antrim.  Donnchadh Ó hAmhsaigh, known in English as Denis Hempson also a harper, was a great admirer of Cornelius Lyons and played a number of fine baroque-style variation sets by Lyons.  Only one of the tunes Lyons composed survives; this is "Miss Hamilton" (Inion i Hamilton).  However Lyons wrote variations on existing tunes of which five have survived, including "The Coolin" and "Slieve Gallen".  "Miss Hamilton" was written in 1706.
Title: Variations on a Theme by Tchaikovsky (Arensky)
Passage: Variations on a Theme by Tchaikovsky, Op. 35a, a piece for string orchestra by Anton Arensky, started out as the slow movement of his String Quartet No. 2 in A minor, Op. 35, for the unusual scoring of violin, viola, and 2 cellos.  It was written in 1894, the year after the death of Pyotr Ilyich Tchaikovsky, in a tribute to that composer.  It was based on the theme from the song "Legend: Christ in His Garden", the fifth of "Sixteen Children’s Songs", Op. 54.
Title: Anton Arensky
Passage: Anton Stepanovich Arensky (Russian: Анто́н Степа́нович Аре́нский ; 12 July [O.S. 30 June] 1861 – 25 February [O.S. 12 February] 1906 ), was a Russian composer of Romantic classical music, a pianist and a professor of music.
Variations on a Theme by Tchaikovsky (Arensky) Anton Arensky