The name Amelia Waltz seems to have been popular. American Memory has sheet music for four tunes (no lyrics), all mid-19th century, all published in the U. S.:
Amelia Waltz for guitar. By Lumbye, arr. C. C. Converse, 1856.
Amelia Waltz, by Louis Wagener, 1853.
Amelia Waltzes, by F. W. Hagemeyer, 1847.
Amelia Isabella Waltz, by Weder, 1847.

Not pertinent to MacQuillen's tune, but interesting trivia.