Johan Braakensiek
Johan Coenraad Braakensiek( 24 May 1858, Amsterdam – 27 February 1940, Amsterdam) was a Dutch painter, illustrator and political cartoonist.
He is the grandfather of Jan van Oort.
Jan III of Oświęcim
Jan III of Oświęcim  (1366 – by 19 August 1405) was a Duke of Oświęcim since 1376 until his death.
He was the eldest child and only son of Duke Jan II of Oświęcim by his wife Hedwig, daughter of Ludwik
I the Fair, Duke of Brzeg.
Initially, historians thought that Dukes Jan II and Jan III are the same person, until the discovery of further sources who confirmed Jan III's existence.
Jan I the Scholastic
Jan I the Scholastic( 1308 /10 – 1372 before 29 September), was a Duke of Oświęcim from 1324 until his death.
He was the eldest child and only son of Duke Władysław of Oświęcim by his wife Euphrosyne, daughter of Duke Boleslaus II of Masovia.
Casimir I of Oświęcim
Casimir I of Oświęcim( 1396 – 7 April 1434) was a Duke of Oświęcim since 1406( under regency until 1414), ruler over Toszek( from 1414) and Strzelin( during 1416 – 1427).
He was the only child of Duke Przemysław of Oświęcim by his unknown wife.
Jan IV of Oświęcim
Jan IV of Oświęcim( 1426/1430 – by 21 February 1497), was a Duke of Oświęcim during 1434 – 1456( until 1445 with his brothers as co-rulers) and Duke of Gliwice from 1465 to 1482.
He was the third son of Duke Casimir I of Oświęcim by his first wife Anna, daughter of Duke Henry VIII of Żagań.
Przemysław of Oświęcim
Przemysław of Oświęcim( – 1 January 1406) was a Duke of half of both Głogów and Ścinawa since 1404 and Duke of Oświęcim from 1405 until his death.
He was the eldest son of Przemysław I Noszak, Duke of Cieszyn by his wife Elisabeth, daughter of Bolesław, Duke of Koźle- Bytom.
In the chronicle of Jan Długosz he is named the second son, but this is certainly a mistake, because elsewhere, he was always placed in first place before his brother Bolesław I.
Henry Krause
Henry J." Red" Krause, Jr.( August 28, 1913 – February 20, 1987) was an American football offensive lineman in the National Football League for the Brooklyn Dodgers and the Washington Redskins.
He played college football at St. Louis University.
He is the grandfather of Jennifer Krause
He is the great grandfather of Payton Hoeing
Władysław of Oświęcim
Władysław of Oświęcim( 1275/80 – by 15 May 1324), was a Duke of Oświęcim from 1315 until his death.
He was the eldest son of Mieszko I, Duke of Cieszyn by his wife, probably called Grzymisława.
Marek Sobieski
Marek Sobieski( 1549/1550 – 1605) was a Polish – Lithuanian noble( szlachcic).
He was a courtier from 1577, a Royal Court Chorąży( chorąży nadworny królewski) from 1581, a castellan of Lublin from 1597, and a voivode of Lublin Voivodeship from c. 1597/ 98.
He was the grandfather of Jan III Sobieski, the elected King of the Polish – Lithuanian Commonwealth.
Jan II of Oświęcim
Jan II of Oświęcim  (– 19 February 1376) was a Duke of Oświęcim since 1372 until his death.
He was the only son of Jan I the Scholastic, Duke of Oświęcim, by his unknown first wife.

Question: Who is Jan Iii Of Oświęcim's paternal grandfather?
Answer: Jan I the Scholastic