If you liked, you could always post some of the family names you don't like and we could try to help you think of alternatives that still honour them in some way. You could also use the name of a favourite flower or gemstone of somebody that you love.
At any rate, How about...
Margaret AbigailMargaret AliceMargaret BethanyMargaret CassandraMargaret ClaireMargaret ElizabethMargaret EsmeraldaMargaret FelicityMargaret HopeMargaret IvyMargaret LaviniaMargaret OpalMargaret PerditaMargaret RoseMargaret Theodora