Gender: girl
Initially we searched for Maria's full name in the database, 'sounds like' her name, and her first initial and her last name, and we found no matching results. However, after searching for 'Maria Leszcznski' instead of 'Maria Leszczynska' an exact match came up of a female student who was born in 1926. This would have put her at the necessary age to have been attending Gymnasium. This is most likely the student from the list.