I can't find any reference to the child's gender on the page you linked to, and as this seems to be an African-American baby it seems much more likely to me that it's a boy named after Rubin "Hurricane"
Carter:
http://en.wikipedia.org/wiki/Rubin_Carter
Ransom was a name regularly found in the USA during the 19th century. It was probably originally a use of the surname as a given name rather than coming from the word.