I had a friend who lived up in Pattonsburg when I was young and hence was a bit familiar with where Braymer was. I grew up on a small farm south east of KC. Well, thinking on this a bit, I was seeking Calverts who end up in the general vicinity of KC, and knowing one of the descendents of Isaac Calvert, Reason (Rezin) Calvert, ended up in Cass County MO I went through the Calverts that I know about to no avail at this point(you can see my general family line if you search Isaac Calvert, posted this board).
There are several other possible Calvert Families But this Northern Mo locale in Western Mo is a bit different than I had seen. Descendents of Reason end up in KS and many are buried all over Northern Cass County and Southern Jackson County(KCMO - South).
Over in St. Louis area we have the Burwell Calvert family. Another family is that of Jeff Calvert whose ancestors were over in North East Missouri. My own family came late from West VA/PA/ and WV and moved into either STL or OKlahoma and backed up into Southwest Missouri in later years(1900s).
There is a Calvert Family who came out of GA/AL into AR that seems a good possibility. Colberts who can be Colbert of those such as James Logan Colbert or the "other" non-Indian related Colberts also settle in the south from AL for example and drift north.
Just my guess but your Lily Myrtle most likely is one of the Calverts who followed the migration route west say through VA to KY for example, or another path via Western VA into OH and then south.
One thing about this name is that there is something a bit different about the combination of Lily and Myrtle.
Myrtle Calvert, b 1872 in Mon County WV, d.o Isaac Calvert who married Rhoda LNU. We have not had the time to figure Rhoda out and I do not know whom Myrtle married. Known siblings: Franklin and Ada. Isaac was the son of Elisha Calvert who married a Lydia LNU. See this board regarding Elisha's daughter, Martha Delphine who married Uriah Rinehart.
Myrtle Blanche Calvert was b 1877 d.o Dr. Thomas Miller Calvert and his wife Mary Elizabeth John. This also Mon Co WV. I have not followed this Myrtle either. See this board for Dr. Thomas Miller Calvert, Letter from Ida Calvert and discussing Isaac Calvert, wife Faney Bulet (sic), Thomas Sr etc.
I know this is of no immediate help but this is what I have on Myrtle in my direct Calvert lines. I know less about some of the family as I have not pursued it but I will dig in other data and see if I can locate others...too many files of things I need to pursue and do, not enough time.