What is the last name of Cinderella's stepfamily?

Cinderella’s stepfamily has the last name Tremaine.

Lady Tremaine is Cinderella’s stepmother, and her daughters are Anastasia Tremaine and Drizella Tremaine. Together, they form the household that mistreats Cinderella after her father’s death and reduces her to domestic servitude.

The surname is especially associated with the stepmother in the 1950 animated film: the character is formally identified as Lady Tremaine, while the daughters are commonly named Anastasia and Drizella Tremaine in Disney character references. Cinderella herself is not given a conventional surname in the film, so “Tremaine” specifically identifies the stepfamily rather than Cinderella’s birth family.

The name also carries into later Disney versions. Cate Blanchett played Lady Tremaine in the 2015 live-action adaptation, which expands the character’s personal history, while Anastasia and Drizella remain her daughters. The 1950 film’s stepfamily is therefore distinct from versions of the fairy tale where the relatives are unnamed or given different names.