How is it less feminist to give your daughter, the future queen regnant, a name you simply like with no associations for her (as she has confirmed Estelle was rather than after a distant relative) rather than try to find a place for her in centuries of patriarchal tradition?
Well, the expectation and hope is that Victoria and Estelle will indeed find a place in centuries of patriarchal tradition by succeeding (in multiple senses) as heads of the traditionally patriarchal institution of the Swedish monarchy.
And in Swedish and European tradition, the boys born to be heads of royal or noble families are traditionally given names of the predecessors, and on the occasions when they are not, then at least names with some royal significance – whereas daughters are often named more freely because they are not expected to carry on the dynasty.
Compare the naming of the most recent generations of boys who were expected at birth to become monarchs: Every single one was named after a previous monarch(s).
Carl, Gustaf, and Carl Gustaf were the names of past kings of Sweden.
Frederik and Christian were the names of past kings of Denmark.
Harald and Haakon were the names of past kings of Norway.
Willem was the name of past kings of the Netherlands, and Alexander was the name of a prior crown prince of the Netherlands.
Charles, William and George were the names of past kings of Britain.
Juan, Carlos, and Felipe were the names of past kings of Spain.
Baudouin/Boudewijn was the name of several reigning counts of Flanders, one of the medieval states located in the territory of the modern kingdom of Belgium, and of one of the patron saints of the Belgian royal family.
Jean, Henri, Guillaume, and Charles were the names of past dukes or grand dukes of Luxembourg.
Hans-Adam, Alois, and Joseph Wenzel were the names of past princes of Liechtenstein.
Rainier, Albert, and Jacques were the names of past princes of Monaco.