Beyoncé and Jay Z’s twin baby names revealed as Rumi and Sir Carter as power couple file trademarks for their newborns, who have joined big sister Blue Ivy

Beyonce and Jay Z are proud new parents to twins[Getty]

Power couple Beyonce and Jay Z have named their new daughter and son, Rumi and Sir Carter. 

The couple are already parents to five year old daughter Blue Ivy. 

The names of the tots have been revealed as Beyonce and Jay Z filed trademarks to protect the names.

Beyonce is now a mum of three[Beyoncé/Instagram]

According to TMZ, the company run by Beyonce and Jay Z filed legal documents on Friday 30 …