Retha kacha mma aha pụtara: Oge a, Enyịn, Emesapụ aka, Ifịk, Oké njọ. Nweta Retha pụtara aha.
Dannemann kacha mma aha nna pụtara: Enyịn, Ifịk, Eru, Eji obi ụtọ, Iwe. Nweta Dannemann pụtara aha nna.
Retha si malite aha mbụ. Short form of Margaretha. Nweta Retha si malite aha mbụ.
Agakọta aha maka Retha na mba dị iche iche na-asụ asụsụ: Gosia, Greet, Gréta, Greetje, Greta, Gretchen, Grete, Gretel, Grethe, Griet, Märta, Maarit, Maighread, Mairead, Mairéad, Maisie, Małgorzata, Małgosia, Mared, Maret, Margaid, Margalit, Margalita, Margaréta, Margareeta, Margareta, Margarete, Margaretha, Margarethe, Margarid, Margarida, Margarit, Margarita, Margaux, Marged, Margherita, Margit, Margita, Margot, Margrét, Margreet, Margrete, Margrethe, Margriet, Margrit, Marguerite, Marit, Marita, Marjeta, Markéta, Marketta, Marsaili, Marzena, Meggy, Mererid, Merete, Merit, Meta, Mette, Mysie, Reeta, Reetta, Rita. Nweta Retha na ndị ọzọ asụsụ.
Kasị nkịtị surnames na aha Retha: Lauter, Bywaters, Verardi, Urben, Reglin. Nweta List of surnames na aha Retha.
Kasị nkịtị aha na aha ikpeazụ Dannemann: Claude, Eladia, Margareta, Lindsy, Margaréta. Nweta Aha na-aga na Dannemann.
Ndakọrịta nke Retha na Dannemann bụ 80%. Nweta Ndakọrịta nke Retha na Dannemann.