A I work at Medicare...you would be surprised the number of babies added to their parents Medicare card with just Baby Smith due to the fact the parents just couldn't make up their mind.
thats us currently! tho i havent, and wont put her on medicare untill we agree on one. its not the first time its happened either, ds2 was 'baby' for almost 2 months, ui had to express the birth certificate app off as it was very close to the 60 day limit! we are close to having a name now tho, were sitting on 5 we both like.

Df's mum changed his nam when he was a bub, there was a extra middle name added, last name changed from his dads to his mums and his first name switched to something simmilar but difrent. he has hated the fact she done that and always used his original names, even his licence is in the first birth cert's names.