Perhaps you could give us the reference you used to find this meaning? It would be interesting.
Unfortunately, it isn't accurate. Rael is a dialectal contraction of the Scandinavian name
Ragnvald, used in Old Swedish. It is not Hebrew. Ragn means Advise and Vald means Power, so it could mean "military adviser", or it could just be a merger of the two separate names, Ragn and Vald.
Apparently it is used as a female name in Finland, again as a contracted form, this time of the authentically biblical
Rachel.