Lennin is of Russian origin, derived from the surname Lenin, which was borne by Soviet leader Vladimir Ilyich Ulyanov, better known as Lenin. The name gained popularity after his rise to power in the early 20th century. It has since been used as a given name, particularly in Russia and other former Soviet states.
"Lennin experienced peak popularity between 2002 and 2006, with at least 12 births each year during this period. However, it has since seen a decline, with only 5 births recorded in 2021."