"Rachie", frequently sung to the hymn "I Bob Un Sydd Ffyddlon", is a Welsh hymn tune. The music was composed by Dr. Caradog Roberts (1878-1935), with lyrics by Henry Lloyd, who is better known by his Bard name Ap Hefin. The lyrics are a call to battle, as can be seen from the English translation. The hymn is still a popular choice at Welsh rugby matches. Welsh & English lyrics are available at http://www.madog.org/dysgwyr/caneuon/can06.html The composer of the hymn tune was born in Rhosllanerchr