The Carter Twins are name Rumi and Sir Carter.
It looks like the Carters are trying get one up on Kimye with their children names.
According to reports, It seems Rumi and Sir Carter are the new additions to the family. We know that because the company run by Bey and Jay that owns the trademarks to their names filed legal docs Monday, June 26 — right around the time the twins went home — to secure rights to the names Rumi Carter and Sir Carter.
The docs are filed by the same company that filed for a Blue Ivy trademark earlier this year.
The name Rumi appears to be an homage to a 13th century Persian poet by that name — and Sir happens to be referenced in one of his most famous poems: