I can find no connection between those conditions and hereditary neuropathy. But I do know that both RLS and the other conditions you describe are sometimes associated with magnesium deficiency, and some people find relief from magnesium supplementation, along with B vitamins.

I would encourage you to look at causes other than hereditary ones. Too many people have the mistaken idea that genetics are destiny when, in fact, there is much you can do to improve your health.

It could be that your genetics are a contributory factor. For example, perhaps your family members might need greater than average amounts of magnesium in you diet. Or you might have a more difficult than average time in absorbing magnesium. Then again, perhaps your water supply or the foods your family routinely eats are low in magnesium (and high in calcium).

Another factor: dopamine has been associated with RLS as well as Parkinson's -- though by different mechanisms.

Some evidence shows that dopamine is a magnesium-dependent neurotransmitter, so it could be that magnesium is a good place to start on both counts.

It is also a fairly benign supplement, except for people with kidney disease and certain heart conditions.

Here is a factsheet from the National Institutes of Health:
http://ods.od.nih.gov/factsheets/magnesium.asp