A woman who keeps her maiden name when she marries is signaling:

Name: A woman who keeps her maiden name when she marries is signaling:
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By keeping her maiden name, a woman is indicating that she values her personal identity and career reputation. It does not necessarily indicate a decreased commitment to the marriage or an increased desire to divorce. The difficulty of changing one's name may contribute to the decision, but the primary reason is typically to maintain one's professional identity.

A Woman Who Keeps Her Maiden Name When She Marries