Mom's sons

Mom's three sons, Walt, Larry and Igner, are remarkable by their devotion to their own mother and her business methods. They are the primary henchmen of Mom's business, and they are often sent out on dubious missions. Despite their somewhat comical characteristics, they seem to be quite successful in their tasks, such as stealing Fry's money, even though their scheme was dubious to begin with. Of course, this may also be attributed to Fry's own stupidity.

While fascinated by their mother, she is not above physically abusing them, usually by slapping. Something they understand as a lesson, and do not protest.

Of the three, Walt is the leader type, and occasionally slaps the others, and can deal orders out that their mother gives them. Larry is the shy and slightly scared one, who try to avoid confrontation from Mom by even thanking her for her abuse. The last, Igner, is the stupidest of the three, who is often used by the trio to perform the less appealing tasks.

Despite their obvious love for their mother, they were not in favour of her attempt to overthrow humanity, and as a result planned a mission to get Professor Farnsworth back together with Mom.

Age
While their age is never established directly on the show, events in Bender's Game seems to indicate that they are between 30 and 35 years old. While telling of his third return to work for Mom, Professor Farnsworth mentions it was "some 30-odd years ago" from a context perspective of 3008, meaning the flashback of Mom's children probably took place in 2980, making them around 30 years old by 3010. Since Igner is Farnsworth's son, and Walt and Larry are not, it is obvious that they are not twins, but most likely have been born within a couple of years of each other, as they are seemingly all at the same stage in Farnsworth's flashback.

Trivia

 * Larry has appeared more often than his siblings, albeit in non-speaking roles.
 * Igner was originally thought to be spelled as "Ignar".
 * Igner is the half brother to Walt and Larry, due to his father being Professor Farnsworth.
 * It is revealed that Farnsworth is Igner's father in Bender's Game during a parody of the fight between Luke Skywalker and Darth Vader, in Star Wars Episode V: The Empire Strikes Back, in Momon's cave.
 * Igner's name could be a pun on the insult "ignoramus".

Quotes

 * Igner: Can I wear your fat suit? Mom: No Igner, put that down!
 * [repeated line in Bender's Game] Igner: We're owl exterminators!
 * [Mom and Walt are laughing maniacally, Larry follows suit] Mom: What are you doing? Larry: Sorry, it's just so infectious. Mom: So is Herpes! [she slaps him]

Appearances

 * - Larry only
 * - Larry only
 * (seen in audience)
 * - Larry only
 * - Walt only
 * - Larry and Igner only
 * (seen in audience)
 * - Larry only
 * - Walt only
 * - Larry and Igner only
 * (seen in audience)
 * - Larry only
 * - Walt only
 * - Larry and Igner only
 * - Walt only
 * - Larry and Igner only
 * - Larry and Igner only