I am not fully convinced that her Birth Surname is Dowtort. There are 2 records - marriage which gives Rosalia Gotto....na of Swintupis, Krekenava Parish. On the baptism record of her son, she is given as Rosalia Gotortowna. Also on the baptism record is a Godmother Agatha Gotortowna. The Godmother is "of Lauda".
Thus, from these records, her Surname should be Gotort. While I have not searched the Surname significantly, I have found the closest to be Gotart.