Since she was fostered as an actual eldest daughter because of her elder sister's early death, it had been thought that the real eldest daughter was Teiko BABA and that she, who was actually the second eldest sister, died young for a long time.
長姉の夭折により実質的な長女として育てられたため、永らくの間は本来の長女の名前が馬場貞子であるとされ、次女である当人が夭折したとされていた。