Yes, the brothers Gasol, in NBA terms, are really only united through one Javaris Crittenton (Too many t's? Too few t's? I'm never sure).
I know it's not the point of this awesome Web site, developed by some folks apart of the Harvard College Sports Analysis Collective, but I still feel like it'd just be easier to say, "They're brothers."
Just goes to show you: Blood is thicker than water in the real world, but silly trades and rookie salaries are the ties that bind in the NBA.
And seriously, check this thing out. Your mind will probably be blown.