Complex sentence: A portion of this estate had belonged in fief to the von Gemmingen family since 1577 and when it came in its entirety to the Elector Palatine in 1677 under the administration of the city of Hilsbach, he transferred his rights therein to the two raugraves.
Split into simpler sentences: A portion of this estate had belonged in fief to the "von Gemmingen" family since 1577. When it came in its entirety to the Elector Palatine in 1677 under the administration of the city of Hilsbach, he transferred his rights therein to the two raugraves.