In all the world, Grna (Grna 
) is an extremely rare unknown gender first name. Very seldom, Grna is the last name as well as the forename.
Ewa, Henryka, Izabela, Urszula, Marianna, Stefania, Czeslawa, Bogumila, Krystyna, Gertruda, Genowefa, Leokadia, Elzbieta, Wieslawa, Magdalena, Miroslawa, Agnieszka, Katarzyna, Kazimiera, Malgorzata, Stanislawa, Aleksandra, Jolanta, Jadwiga, Grazyna, Barbara, Anna, Maria, Alina, Beata, Hanna, Irena, Iwona, Wanda, Zofia, Sabina, Bronislawa, Alicja, Bozena, Renata, Danuta, Dorota, Lucyna, Janina, Joanna, Teresa, Halina, Helena, Aniela, and Wladyslawa