I love [name_f]Cassie[/name_f], best with a C. [name_f][/name_f] I feel it is an obvious nickname for [name_f]Cassandra[/name_f], [name_f]Cassiopeia[/name_f] …I suppose any name beginning with [name_m]Cas[/name_m]. [name_f][/name_f] That begin said, I believe it was also used as an old time nickname for [name_f]Catherine[/name_f]. [name_f][/name_f] I’ve known quite a few Catherines who go by [name_f]Cassie[/name_f].