Yes but Robert Barlow was born in England.(the year before Cowell) He is the one you mention. My info. on Robert Barlow comes from the Gympie library who have been very helpful. Also I have some info. from Castlemaine in Victoria. There was an early ad. in an Australian newspaper that referred to him as American. He may have promoted that idea. Anyway it caused some confusion. Sam Cowell is another Billy Barlow. My information on him comes from the book his wife wrote - The Cowells in America. John Lawrence Toole also played Billy Barlow and sang his own song as that character. He wrote his own biography and my info. for him comes from that. He toured Australia in the late 1800s and sold his sheet music here. His song is based on Cowell's which he admits. The Billy Barlow song was already in Australia. It was written in 1943 by Sydney businessman Benjamin Pitt Griffin. ref. Bagot, Alec - Coppin the Great.   Well before Toole. The other Billys you mention I have also looked into and many more.