Sibling Rivalry

[Fax]

In 1978 the Alpine Renault A442 driven by Jean Ragnotti, Guy Frequelin and Jose Dolhem finished fourth to its winning stablemate A442 of Didier Pironi and Jean Pierre Jaussaud.  Obviously the cars were sisters, but who among the drivers were related as well?
Fax

[Mr. Rick]

Jose Dolhem was the half brother of Didier Pironi.

Sadly neither of them are with us any more. Dolhem died in a light aircraft accident in 1988 while Pironi, having survived a horrendous F1 accident in 1982, died in a power boat racing accident in 1987 off the Isle of Wight.

[Fax]

Nice Rick!  I thought that one might make it till morning but you know your stuff.
Fax

[Mr. Rick]

Cheers Fax. Actually, the memory isn't what it used to be (22 Le Mans have seen to that!), but I have a good personal library here in my office!