Patri-quasi-cide

With today's news that one or more (but perhaps less than all? ... he has seven) of Qaddafi's sons are proposing a transitional government that would result in the removal of their father from power, let's think about other sons who have deposed their fathers......

Edward III followed (not unsurprisingly) Edward II who was deposed (but it's not clear that it was Edward III who was doing the deposing).

In Greek mythology, Cronus deposes his father Uranus.

Sheikh Hamad bin Khalifa Al-Thani, current Emir of Qatar, deposed his father Sheik Khalifa bin Hamad bin Abdullah bin Jassim bin Muhammed Al-Thani in 1995.

I'm sure there are others.....