A couple who could not have children naturally had kids by means of a surrogate (not sure whose sperm or egg or if that’s relevant). They’re having a giyur (conversion) for the kid and have requested to use their names, and not Avraham/Sara on the teudat giyur (conversion certificate). Do you have thoughts/an opinion about this? Thank you in advance!
If it were both the husband’s sperm and the wife’s egg then you definitely can, because many authorities say that maternity is defined by whose egg it was (for example, Rabbi Shlomo Goren (Torat HaRefuah, pg. 176-177), Rabbi Ovadia Yosef