Niclaus is a unique and historic given name, derived from the Latin nickname 'Nicolaus', which means 'victory of the people'. It was popularized during medieval times as a shortened form of Nicholas, itself originating from the Greek 'Nikolaos'. The name Niclaus reached its peak in popularity during the Middle Ages but has since become quite rare.
"Niclaus saw an increase in popularity between 2000 and 2006, with five births each year during that period, totaling ten."