Introduction Where does the name Caslaw come from? Since I started my research into the family history I've come across the name in various locations: A Dictionary of Russian Surnames It could be a corruption of - Castle Law (There are hills with that name in the Scottish borders) - of Caslow/Coslow/Castello - there are quite a few of those - of Caisely/Casley/CarlowI've found the name in 1227 Zittau (Saxonia - Czech - Bohemia) - nobleman Caslaw 1679 Selkirk, Scotland (birth) - Erial Caslaw 1700 Selkirk, Scotland (marriage) - Erial Caslaw 1771 Brancepeth, Durham - Ann Caslaw 1803 Newcastle upon Tyne (marriage) - Margaret Caslaw 1808 (birth) - James Caslaw Newham, Northumberland 1810 Kentucky, USA (birth) - Lydia Caslaw 1829 13th May - Oath of Allegiance to USA - - John Caslaw (ex GB) 1830 Newcastle County, Delaware, USA - James Caslaw 1840 Brown County, Washington Township, USA 1850 Milton Borough, PA, USA - John F Caslaw - Druggist 1873 Milton, Glasgow, Scotland (marriage) - John Caslaw 1874 Barony, Lanark, Scotland (birth) - James Caslaw Most of the existing Caslaws are in the United Kingdom. If you are a Caslaw, please get in touch.