I note the absence on Z2535 or equivalent on , which one of my cousins claimed was"proficient" in Scotland and posted several YouTube vids re this, have conferred with Dr. Bruce Durie, sennachie of his clan Chief, BSc (Hons) PhD OMLJ FIGRS, Consultant Genealogist and Heraldist, Author, Broadcaster, Lecturer, and I asked him if there was any evidence of concentration of I-Z2535 (or precursors or downstreams) in Scotland, and he was kind enough to examine our Slaton project results and respond, and his opinion is basically the same as that promulgated by Ken Nordtvedt: more Anglo-Saxon than anything else.
Clinton Slayton (A1890>A11041>F1997>FT26183 >A11035 >A11036+)