Matriarch is the embodiment of the "mother".
Taking reference from Pink Floyd's 'Mother',
"Nightmares come true
Mama's gonna put all of her fears into you
Mama's gonna keep you right here
Under her wing"
Mama's gonna put all of her fears into you
Mama's gonna keep you right here
Under her wing"
A mother dishes out the worst in you, A mother dishes out the best in you. A forgotten demon lies within your closest kin.