Thank you James for your message. I am still searching for the family of Charles Lumsden of Aberdeenshire whose father was Thomas Lumsden of Lyne. He had several sons in addition to Charles the youngest, including Alexander, John, Robert and James. I have not been able to locate information on this family, except that Alexander married a daughter of the Lumsden laird of Cushnie and Clova, the historical Aberdeenshire Lumsden family about which much has been published. Archie Lumsden in the House of Lumsden historian and administers the FamilyTreeDNA Lumsden Y-DNA project. You may be able to find good information on the Fifeshire Lumsdens through this resource. His family is from Fifeshire. If you are not already a member of the project and are interested go to:https://www.familytreedna.com/public/lumsden/
This project has helped me very much to locate matched cousins in Canada and Ireland, some of whom have connections back to Aberdeenshire and Banffshire.
I hope this helps.