The New Zealanders both arrived at Kingston Park in the summer, with Richard having joined from Esher and Michael having teamed up with his older sibling from North Harbour.
And the duo have now signed two-and-a-half-year contracts after impressing during their time at the Falcons.
The 24-year-old hooker Michael has scored twice in 13 appearances for the side, while No.8 Richard, who is a year older, has turned out eight times - although he has been sidelined for five weeks with a knee injury.
And Falcons head coach Alan Tait is hoping the English-qualified duo are the first in a number of players to commit to the club.
He told the club's Falcons TV: "I am delighted that Michael has decided to re-sign for the club and with Richard I told him that it would be nice for him to stay with his brother.
"Richard has extended his deal to match his brother's. This is the time of the year when we are looking to build - we are talking to players and agents at the moment.
"Hopefully this is the start of some more lads coming into the club. We are looking to strengthen the squad and there are also about 12 players we are looking to re-sign so hopefully we will get them to commit."
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
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The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.