here’s a quote from a youtube clip:
“Before the Andrews Sisters, before the Boswell Sisters, one of the first sister recording acts were the Brox Sisters. Virtually unknown today, the Brox Sisters were the premiere sister singing group of the 1920s. They starred on Broadway in the Ziegfeld Follies and the Music Box Revue shows.”

i want to find out what the name of which boswell sister is on the left in that first video…