Grethe kacha mma aha pụtara: Eru, Obodo, Emesapụ aka, Oké njọ, Iwe. Nweta Grethe pụtara aha.
Petrey kacha mma aha nna pụtara: Enyi na enyi, Oké njọ, Oge a, Kechioma, Okike. Nweta Petrey pụtara aha nna.
Grethe si malite aha mbụ. Short form of Margrethe. Nweta Grethe si malite aha mbụ.
Agakọta aha maka Grethe na mba dị iche iche na-asụ asụsụ: Gosia, Greet, Gréta, Greetje, Greta, Gretchen, Grete, Gretel, Gretta, Griet, Jorie, Märta, Maarit, Madge, Mae, Maggie, Maighread, Mairead, Mairéad, Maisie, Małgorzata, Małgosia, Mamie, Mared, Maret, Margaid, Margalit, Margalita, Margaréta, Margareeta, Margaret, Margareta, Margarete, Margaretha, Margarethe, Margaretta, Margarid, Margarida, Margarit, Margarita, Margaux, Marge, Marged, Margery, Margherita, Margie, Margit, Margita, Margo, Margot, Margrét, Margreet, Margriet, Margrit, Marguerite, Marit, Marita, Marje, Marjeta, Marjorie, Marjory, Markéta, Marketta, Marsaili, Marzena, May, Mayme, Meg, Megan, Meggy, Mererid, Merit, Meta, Midge, Mysie, Paaie, Peg, Peggie, Peggy, Peigi, Reeta, Reetta, Retha, Rita. Nweta Grethe na ndị ọzọ asụsụ.
Kasị nkịtị aha na aha ikpeazụ Petrey: Francis, Zaida, Joan, Nelia, Dewitt. Nweta Aha na-aga na Petrey.
Ndakọrịta nke Grethe na Petrey bụ 72%. Nweta Ndakọrịta nke Grethe na Petrey.