Headcannon: If- im sorry lets be realistic, WHEN Zane and Pixal get married Pixal is going to keep her last name for a few reasons.
1. She thinks the human tradition of wives taking their husband’s last name is sexist and similar to someone putting their  name on an object of their’s.
2. Cyrus Borg wants to have Pixal be the next CEO of Borg Industries.
3. Borg is most likely a very powerful and respected person so having her father’s name could benefit Pixal.
So Pixal took Zane’s last name as a middle name.
(Primary Interactive X-ternal Assistant Lifeform Borg —> Primary Interactive X-ternal Assistant Lifeform Julien Borg)
Zane decided to take his wife’s last name as his last name and make his original last name his middle name. Because he wants people to know that he has the BEST wife EVER! And because now he and Echo Zane don’t have the same exact name.
(Zane Julien —> Zane Julien Borg)
Their children however have their mother’s last name and have Julien as a middle name.
(MiniPix Seven Julien Borg, Nin Julien Borg, and Digital Julien Borg)
