Hi,
Do you already have more info? Maybe wives of the 3 brothers?
I found some records of them on the Ellis Island records, but insufficiënt. I can't find anything else on the internet, but November 24th I'm going to the national archives. I can take a look and see if I can find the birth certificates and maybe a marriage certificate?
Or is it your intention to find decendants of Arthur, who stayed in Belgium?