In The Register database one can find many variations in the spelling for a surname, this doesn't normally cause a problem unless it impacts the same man (or woman); one may miss a crucial piece of information. This is true also for the other sources, whether on the internet, printed or in an archives. Unlike these sources The Register is the only source that actively corrects such anomalies to create the most accurate source on British Empire participants in the war.
For this Scandinavian surname there are 12 variations:
Ohlsen, Ohlson, Ohlsonn, Ohlssen, Ohlsson, Oleson, Ollson, Ollssen, Ollsson, Olsen, Olson and Olsson
So far there are three examples where the same man has his surname recorded differently between the medal rolls and the official casualty rolls which have been faithfully copied by others.
For many the research into a soldier starts with a medal. The medal rolls and Nominal Roll (WO127) shows a Trooper 681 F Olsen 2nd Brabant's Horse, he is entitled to the QSA with the important Wepener clasp for the siege of Jammersbergdrif. Searching the online casualty roll on Ancestry for 'Olsen' shows two different soldiers:
So this 681 F Olsen was not a casualty. In fact he was wounded near Hammonia on May 28, 1900, the official casualty roll records the surname as 'Ohlssen'.
Charles G Ohlsson was Trooper 25737 in the Prince of Wales' Light Horse and later Trooper 183/36040 in 2nd Kitchener's Fighting Scouts. Like his namesake above Ohlsson was wounded, at Tweefontein November 14, 1901, and on the official casualty roll his surname is recorded as 'Ohlsen'. Happily Ancestry shows 'Ohlsen' when searching for 'Ohlsson'. He was awarded the Distinguished Conduct Medal.
Carl Olsson served, albeit briefly, as Trooper 230 Utrecht-Vryheid Mounted Police then enlisted as Private 540 2nd Kitchener's Fighting Scouts. Just like the two men above he was wounded, at Boschbult March 31, 1902. In the casualty roll the surname is recorded as 'Ohlsson'. Again, searching by 'Olsson' on Ancestry fails to show the casualty record.
The records for these man on The Register show all their units, medal entitlement, honours and casualty information in one unified record - saving time for researchers and ensuring they don't miss key facts.