I realize you posted your message some time ago and you may have already found the answer to your question. Regardless I may be able to help.
I have done a fair amount of research on the Lyerla families and have a Lorraine M. who has a sister Edna. My Lorraine was born around the same time 1919/1920. Her sister was born in 1921/922. In 1930 they are living in Granite City, Madison County, Illinois.
Their father was Clarence A. Lyerla son of Newbern Zachariah and Emma Angeline (Dunham) Lyerla, son of Zachariah and so forth....
Their mother was Mary, maiden name unknown to me at this time. Let me know if you think this is your Lorraine as I'd like to update my records..
Would love to connect with you on this family .