That is a good question. Conservative judges and politicians like Ted Cruz who are of the 'original intent' school would have to say: a person born in the USA itself. Today, Cruz has fallen from his 'original intent' beliefs because he would then not be a natural born citizen himself and not qualify for the presidency: although his parents were US citizens, Ted was born outside the USA, in Canada. The more modern school of thought (much amazed to suddenly find Ted Cruz in their midst) holds that you also can be a natural born citizen if your parents were US citizens and you as a baby by law automatically qualified from birth for US citizenship.
Ching Doe was born in 1915, in Yunnan, China.
Brian Doe was born in 1862.
Thomas Doe was born in 1912.
John Doe was born on February 25, 1954.
Samuel Doe was born on May 6, 1951.
Andrew Grayham Doe was born in 1955.
Bob Doe was born on 1920-03-10.
Nicholas B. Doe was born in 1786.
Jens A. Doe was born on 1891-06-20.
Antoinette K-Doe was born in 1943.
Ama Benyiwa-Doe was born in 1950.
Doe Boyland was born on 1955-01-06.