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Klinefelter

1. Klinefelter is the 37,649th most popular last name (surname) in the United States; frequency is 0.000%; percentile is 83.596 [SourceCBN]
2. Klinefelter, California, United States [Place] is in San Bernardino County; location is 34°54'2"N 114°45'58"W; elevation is 1,233 feet [SourceGSP]