Hi @Amanda Pitt,
This is the first time I hear this suggestion so thank you for sharing it!
A neat workaround would be to add a “Previous surname” custom field on the patient record, then use the Patients report to quickly filter/search that field (you can even save it as a segment for reuse). You can do this via Settings → Practice → Custom Fields/Other; those fields show on the patient’s Details tab and are reportable.
I’ve logged your request for making previous/alias surname searchable from the global search, that would make this much smoother. I’ll keep you posted on any updates. If any other practices would find this useful too, please drop a comment in this thread so we can feature the request on the homepage. 😊