>>>How about me? Should my kids be called "Mc-McDonnell"?
>>
>>AFAIK sons only.
>>Try MCDonnellson as well.
>
>Eventually, after a couple of more marriages across Slavic countries, we could have a McDonnelssonovich :)... or rather a Megdonelsonović :)

Megalodonsonofavich? http://www.150.si.edu/150trav/discover/d111a.htm