Relative major and minor share the same key signature but a different tonic note (a tonic note is the first note of the scale or in solfege tonic is DO). For example, D flat major has five flats in it's key signature and b flat minor has 5 flats in it's key signature; therefore, D flat major and b flat minor are relative.
The relative minor of E major is C# minor.
The relative major to c minor is Eb major.
The relative minor key of C major is A minor, and the relative major key of A minor is C major.
The relative minor of the major key of C major is A minor.
The relative minor key for A major is F# minor.
The relative minor of Ab Major is f minor.
E Minor is the relative minor to G Major.
The relative minor of D major is B minor.
It's not a major, it's a minor. The relative minor of B major is G# minor.
The relative major key of A minor is C major.
The relative key is the one with the same key signature. For C major, it's A minor.
The relative minor key of C major is A minor.