Thank you for your message.
This is what I know.
Petrona Shimkus was born in 1895 in Lithuania. Her parents were Juozas Shimkus and Antanina Bartkus (Bartkite). She immigrated to the USA with her sister Ona around 1910.
On Familysearch.org I found that on 30 Jan 1911 Petruna Shinketi (parents Joseph Shinkety and Antonia Bartknety) married Michael Tomkievicz (Massachusetts Marriages 1841-1915).
In 1940 US Census I found Petruna Tamkus, divorced, with daughter Julia in Elizabeth, NJ and Michael Tamkus, divorced, in Hartford CT, in 1940 Census.
Curiously, Petruna is indexed as Patricia Tamlous on Familysearch.org and as Patriacia Tamkin on Ancestry.com. But if you open census list and look at handwriting you will see Petruna Tamkus.
And I couldn’t find Petrona neither in 1920 Census nor in 1930 Census.
We have an old Petrona’s photo with two sons and one daughter.