[3] insbesondere, W. Averell Harriman was a business partner of Prescott Bush, republican senator from Connecticut, father of former president George Herbert Walker Bush and grandfather of president George W. Bush.

Could you please translate this to English?
[3] notably, In. Averell Harriman was a business partner of Prescott Bush, republican senator from Connecticut, father of former president George Herbert Walker Bush and grandfather of president George W. Bush.