The New York Jets addressed their glaring need at safety by replacing one Landry with another.
Contract terms were not disclosed by the team, but a league source said Landry received a two-year, $3 million contract, including a $650,000 signing bonus.
LaRon congratulated his brother in a tweet Tuesday afternoon.
"My big bro just sent me a text sayin 'Jet life to da next life'.. congrats big bro," he wrote.
Dawan Landry, 30, cut by the Jacksonville Jaguars before the start of free agency, will be reunited with Rex Ryan and Dennis Thurman. He played under the Jets' coach and defensive coordinator for the first three of his five seasons with the Baltimore Ravens, from 2006 to 2008.
Dawan Landry played an instrumental role last offseason when LaRon, a free agent, was looking for a team. He provided his younger brother with a scouting report on Ryan and his defensive system.
LaRon Landry signed a one-year contract with the Jets and made his first Pro Bowl, but he bolted for a four-year, $24 million contract with the Colts.
The Jets also lost Yeremiah Bell (Arizona Cardinals) and cut top backup Eric Smith, leaving the team thin at the safety position. The only safeties on the roster were 2012 late draft picks Antonio Allen and Josh Bush, neither of whom played last season in the base defense.
With Dawan Landry, the Jets get a proven starter who already knows the system. He isn't known for his pass coverage (only 12 interceptions in seven years), but he should be a solid "box" safety against the run.
He was due to make $5.35 million from the Jaguars and was released after two seasons. Landry, originally a fifth-round pick from Georgia Tech, has played in 98 games. He has 5.5 sacks and three touchdown returns on interceptions.