All that can presently (April 2022) be gleaned about
Louise Brehany from sheet music covers and by Internet searching is that
she was presumably an American actress/singer who has been featured on 7 works published between 1896 and 1908.
She is also credired as the lyricist for two works by
Anna Caldwell.
Her portrait on the left is taken from
Gladys (1901) words & music by
Theodore H. Northrup, and published by
New York Journal and Advertiser, New York, USA.
Surfers are welcome to contribute any further information about this performer.