My gt-grandmother was born Elizabeth ("Lizzie") Lumsden Baird - I'm trying to find out where the "Lumsden" came from, there, too. Her mother was Janet "Jessie" Beveridge, and her mother is marked in my tree as Elizabeth Lumsden, ... but the information I found in the IGI was that this Elizabeth's father was William Beveridge, b. abt 1790 (so I'm not sure I haven't mis-transcribed something!), and her mother was Janet Lyall - I'm searching for birth records and an earlier marriage for Janet, to try to make sense of it.