Lennart or Lennarth is a Germanic variant of the name Leonard, most common in Scandinavia and German-speaking countries as a surname or masculine given name. Notable people with the name include: Surname. Camilla Lennarth (born 1988), Swedish golfer. Isobel Lennart (1915–1971), American screenwriter and playwright. Sonja de Lennart (born 1920), German fashion designer. Given name. A–E. Lennart Alexandersson (born 1947), Swedish footballer, father of football players Niclas and Daniel Alexandersson. Lennart Åqvist (1932–2019), Swedish logician.
https://en.wikipedia.org/wiki/Lennart