Powers

• Alan Powers aka "The Brain"
• Mr. Powers his dad
• Mrs. Powers his mom
• Keith Powers an uncle (probably brother of dad)

The following are other relatives of Brain who haven't explicitly been referred to via the 'Powers' nickname:

• Alan (grandfather) (unclear if this is the paternal or maternal grandparent)
• Cheikh is the Brain's cousin
• either Cheikh's mother or Cheikh's father would need to be a sibling of Alan's mom or dad, making one of them his aunt or uncle and (if they were married) the other one his aunt-in-law or uncle-in-law

See also

• Powerses' car
• Powerses' House