The star couple filed trademark documents to secure the rights to the names Rumi Carter and Sir Carter, TMZ reports.
The trademarks are for fragrances, cosmetics, key chains, baby teething rings, strollers, mugs, water bottles, hair ribbons, playing cards, tote bags, sports balls and rattles and novelty items.
As ETonline reported earlier, Beyonce’s team hit a minor setback in trademarking the name of the Carters’ 5-year-old daughter, Blue Ivy.
It should be recalled that Beyonce and Jay-Z welcomed the twins – a boy and girl – earlier this month.
The new mother and the twins have already left the hospital and set up house at a $400,000-a-month Malibu mansion, where the Carters family is expected to stay for the remainder of the summer.