Who was the son of Baptist Ferdinand Messerschmitt and designed a German single-engine high-wing sports monoplane?
Willy Messerschmitt
Messerschmitt M 17
The M 17 was a German single-engine high-wing sports monoplane.
 It was designed by Willy Messerschmitt in 1925 in Bamberg.
 This aircraft won many competitions and allowed Willy Messerschmitt to build his first factory.
Willy Messerschmitt
Wilhelm Emil "Willy" Messerschmitt (/'vĭli 'messer shmĭt/) (26 June 1898 – 15 September 1978) was a German aircraft designer and manufacturer.
 He was born in Frankfurt am Main, the son of Baptist Ferdinand Messerschmitt (1858–1916) and his second wife, Anna Maria née Schaller (1867–1942).
ICAR Comercial
The ICAR 36 / ICAR Comercial (sic), variously also known as the ICAR M 36, Messerschmitt M 36 or BFW M.36, was a Messerschmitt design built and tested by the Romanian company ICAR in the mid-1930s.
 It was a small, single-engine high-wing airliner, the first civil transport aircraft built in Romania. Potez 43
The Potez 43 was a family of French light utility and sports aircraft, developed in early 1930s.
 They were three-seat single-engine high-wing monoplanes. RWD 3
The RWD 3 was a Polish sports aircraft and liaison aircraft prototype of 1930, constructed by the RWD team, a single-engine high-wing monoplane. Starck AS-80 Holiday
The Starck AS-80 Holiday is a conventional two-seat, single-engine high-wing monoplane designed and built in France around 1950.
 It was sold in kit form but only a few were completed. PWS-52
The PWS-52 was a Polish sports aircraft of 1930, a single-engine high-wing monoplane, constructed by the "Podlaska Wytwórnia Samolotów" (PWS), that remained a prototype. RWD 2
The RWD-2 was a Polish sports plane of 1929, a single-engine high-wing monoplane constructed by the RWD team. BFW M.20
The BFW M.20 (also known as the Messerschmitt M.20 after the designer's surname) was a German single-engine, high-wing monoplane ten-seat passenger transport aircraft, developed in the late 1920s and early 1930s.
 Deutsche Luft Hansa used it throughout the 1930s on a variety of routes. RWD 1
The RWD-1 was a Polish sports plane of 1928, a single-engine high-wing monoplane constructed by the RWD design team.