In memory of Rabbi Gavriel & Rebbetzin Rivkah Holtzberg HYD - Shluchim to Mumbai, India*
Since the mother-in-law has two names and the daughter-in-law has only one name, even though the one name she has is also one of the two names her future mother-in-law has, it’s fine to marry. It’s proper, from the actual engagement on, that each of them sign their names differently.
p. 271 Igros Kodesh Volume 29
Compiled by Rabbi Chaim Dalfin
*As a practical matter, since each person’s circumstances are always different, one must use the guidance above as general instruction. The exact application at any given time must be discussed with a competent rabbi, or/and a counselor of Torah, a Mashpia.