Prince William’s Family Hasn’t Been Resurrected Yet

Because of the peculiarities and particularities of Prince William's prior history, it was much safer to resurrect him first, but only in one instance, and without resurrecting any other being, including any of his ancestors.

Prince William Atreides has no natural descendants, from any of his multitudinous lives, because this is the first life he has been able to draw a breath in.

To be clear, Prince William Atreides is still entirely an orphan...

Except for the Infiltration style robots that raised him...

Which were based upon the brain emulation robots his parents used, which escaped the first massive time travel attack on the original timeline, that left that timeline totally devoid of living beings.

See: Infiltration Model