They dislike their current Facebook name
Couples Combining or Hyphenating Surnames to Form a New One
Another popular trend with married or cohabitating couples is the creation of a new surname using parts of each partner’s name or simply hyphenating the two last names for a brand new joint surname.
Again, some states permit the combining or hyphenation of married couples’ surnames.
Desire for a Less or More “Ethnic” Name
People with names that are identifiably “ethnic” sometimes request name changes for various reasons, including ease of pronunciation and spelling; on the other hand, some individuals would like to reclaim their ethnic heritage by returning to a surname that may have been lost over the years or by the adoption of a new one.
Changing Name Following Divorce
Women who are no longer married to a man may also wish to change their last name to their parents name or whatever name they choose.
Whether it’s because of a recent religious conversion or simply to honor a person’s religious deity, name changes for religious reasons are quite common.
Some Christians may want to switch name on Facebook to reflect their baptismal name.
Same-Sex Partners Sharing Surname
Although same-sex partners may not be allowed to legally marry in all states, they can choose to share a surname, which can be particularly convenient in financial or legal transactions.
Although some may consider it extreme to change your name to support a cause, name changes for political reasons are not unheard of.
There you go.. What’s your reason of changing your last name on Facebook?