Mister is a title used before an individual's surname to convey respect and formality. It originates from the Middle French 'maître', which means 'master'. In English-speaking cultures, Mister is typically used when addressing or referring to adult males, whether married or unmarried. The equivalent title for women is Miss or Mrs (Mrs being reserved for married women).
"The name Mister experienced a significant rise in popularity between the late 80s and early 90s, with a peak of 21 births in 1993. However, it has since seen fluctuating trends, with numbers ranging from a low of 5 to a high of 27 births per year."