There is no saint named Melodie.
The term for a second melody that accompanies the main melody in a musical composition is called a "counterpoint."
Melody
Melody.
direct psalmody
it is called melody
The direction of melody is simply called it's motion.
There is no widely recognized Catholic saint named Melody. However, the name Melody is sometimes used in various cultures and regions, and it may be associated with certain local or lesser-known figures. In general, Catholic saints are often recognized for their lives and virtues rather than by their names alone.
The term for a second melody that accompanies the main melody in a musical composition is called a "counterpoint."
The main tune is called the "head." It establishes the chord structure and overall theme.
melody
a melody
phrase
Lilt
Phrase
there are different words: mix overlap mash up melody 1 & 2
The "A" melody
In opera an aria