Names that gives fertility and marital happiness

In general, names that have the letter “ה” are more capable of fertility,[1], so after G-d changed the name of “Avram” to “Avraham” and changed the name of “Sarai” to “Sarah,” they were possible to give birth.

Well, a recommended name for fertility is the name “Leah” (yes, Maran Rabbeinu Ovadia Yosef ztzok”l said in his shiur on motzai shabat, Parashat Ba’aleich, 5762[2];).

And the name Efrat (Even that it does not have the letter “ה”) is capable of viability, because it is named after brevya and Rebbia, as the sages said in the Midrash[3]: “And calev took Efrat for him – this is Miriam, and why was her name called Efrat, since Shepro and Rabbo Yisrael by her.” (ויקח לו כלב את אפרת – זו מרים, למה נקרא שמה אפרת, שפרו ורבו ישראל על ידיה).

And rabbi Abba Shaul zt”l said that whoever was called “Rachel” (a name that has a fear of infertility) would add the name “Efrat” as well [4].

And there are other names that are recommended on the part of the structure of the letters, but spiritually it is very important to read specifically about the names of the righteous. (and in any case they will also be capable of marital happiness, since this matter depends mainly on virtue and proper behavior), so it is correct to choose one of the two names mentioned above (and refer to the name of Leah or after Miriam the prophetess called Efrat), and it is also possible to “Sarah” as above.

And as i am impressed by the intention of your question, is not about a daughter who was born, but about changing the name for yourself. Well, if many years have passed after marriage and they have not yet gotten pregnant, it is possible to allow the addition of a name (from the names capable of fertility as above) as a virtue for pregnancy [5], As with any name change, one should not “change” a name but rather “add” a name, and this must be done by a clear Torah scholar who will say the “מי שברך” for the name change.