I count 12 to 16 depending on whether you count half-brothers.
Presidents who the first-born child:
? Washington ( older half-brother) , first-born of his mother.
Madison
Polk
Buchanan
Grant
Harding
Coolidge
? F. Roosevelt ( older half-brother) - first born of his mother
Truman
Ford
Carter
? Clinton (older half-brother) - first born of his mother
? Obama (older half -sibs from father's first marriage) but first born of his mother
40
No U.S. presidents were born in England. Many of the early Presidents were born British Citizens as being born in the Colonies, but all were born in what is now the US.
2 presidents
No, no presidents have been born in Rhode Island
No presidents were born in Chicago. Two presidents from Illinois were Abraham Lincoln and Ulysses S. Grant but they were not born in Illinois. Ronald Reagan was born in Illinois but spent most of his life in California. Barack Obama is the first US president from Chicago but he was born in Hawaii.
Zero
virginia
Zero
ONe
Approximately 1 in every 40,000 males is born with Fabry's disease.
8
8
none