What is the scale degree name for notes starting on the first note of the scale?

The scale degree name for notes starting on the first note of the scale is known as the Tonic. In musical terms, the Tonic serves as the foundational note or "home" note of a scale. It establishes the key of the piece and the scale's overall tonal center. When melodies begin or resolve to the Tonic, it creates a sense of stability and completeness.

In various scales, the Tonic is always the first note, regardless of the scale type—whether it’s major, minor, or otherwise. This concept is fundamental in music theory as it underpins the structure and hierarchy of notes within a scale, guiding composition and harmonic progression.

The other terms refer to different scale degrees: the Subdominant is the fourth note, the Dominant is the fifth note, and the Leading tone is the seventh note, each of which has distinct roles within the context of music, but none represent the first note of the scale.