Question: Who was the son of Baptist Ferdinand Messerschmitt and designed a German single-engine high-wing sports monoplane?

Context paragraphs:
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.

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.

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.

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).

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.

Supporting paragraphs: Messerschmitt M 17 Willy Messerschmitt
Answer: Willy Messerschmitt