Betsi, of Old German origin, means "dedicated to God". It is a variant spelling of Elizabeth, which itself derives from 'Adelaidis', composed of the elements 'adal' meaning noble and 'heid' meaning kind or type. Betsi was popular in the late 19th and early 20th centuries but has since become less common.
"Betsi experienced notable fluctuations in birth counts over the years, with a peak of 15 births in 2006 and a low of 5 in several years like 1964, 1971, and 2002. Interestingly, there are multiple years with identical birth counts, such as 6 births in four different years between 1947 and 1981."