If she keeps up numbering her children, she'll be as bad as the Romans at having unique names.
No seriously, check out their whole Prenomen Nomen Cognomen thing. Males usually get a number as their Prenomen, and females get the feminine form of their father's Nomen. Gaius Jullius Caesar (the dictator, died in 44 BC) was the son of Gaius Julius Caesar, and his two sisters were Julia the Elder and Julia the Younger. His daughter was also named Julia. WTF.