All natural minor scales have PARALLEL MAJOR SCALES and RELATIVE MAJOR SCALES.
Parallel major and minor scales have the same starting pitch (or tonic) but have different key signatures.
Relative major and minor scales have the same key signature but different starting pitches.
For example: C major and C minor are parallel scales.
C major and a minor both have no sharps or flats (the same key signature) and are relative major scales.