If this is in the wrong place, the moderators will fix it.
John and Mary, born in Fredonia, leave that country and come to the United States. . In the US, they have a child, Hubert. Hubert marries Sonia whose parents also came from Fredonia and they have a child named William.
What generation is William? I say William is second generation. John and Mary "generated" Hubert (first generation), who then "generated" William - second generation.
Many consider William third generation because he is the third Fredonian to LIVE here, NOT be born here.
What is William? Second or third?