Notes from the Little Flock Hymn Book by Adrian Roach:
Miss Nunn was born in Colchester, Essex, on May 17th. 1778. She lived much in retirement and was never married. The hymn, no 396, was first published by her brother John Nunn, a minister, in a book "Psalms and Hymns". It was first brought to America by a Dr. Leavitt in "The Christian Lyre" in 1830 and has been repeated much there since. How she must have enjoyed the love of Christ as she penned those lines! Paul the Apostle could say, "The love of Christ constraineth us". In 1847 she went to that Friend she had found on earth and whose love meant so much to her.
Dr. Julian wrote that the hymn "One there is above all others, Oh how He loves!" was written to adapt John Newton's hymn "One there is above all others, Well deserves the Name of Friend" to the Welsh air Ar-hy-o-y-nos.
Miss Nunn's hymn in 'Spiritual Songs' is no 396, "One there is above all others, Oh, how He loves!" This is a popular hymn, expressing some knowledge of the great love of Jesus.