Kylie Jenner and Stripe co-founder John Collison are among the 2019 Forbes list of billionaires under 30. 

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An Irishman has lost the title of "youngest self-made billionaire in the world" to none other than social media queen Kylie Jenner. While much of the world debated whether Jenner was truly self-made, Tipperary man John Collison had not much to complain about despite his loss of title, with the Forbes list announcing that he's added another billion to his worth since 2016. 

Haven't we gone over this?

Self-made: Having succeeded in life unaided.https://t.co/g0ZHDSkVfu https://t.co/3O48zKsInN

— Dictionary.com (@Dictionarycom) March 5, 2019

With $2.1 billion in the bank, the Forbes list placed Collison at number 15 in America's Richest Entrepreneurs Under 40 2016 and is ranked at the 1,116th place in 2019's billionaires' list. 

Read more: Irish billionaire, youngest in world, warns of Trump’s anti-immigration policies

Who is John Collison, co-founder and President of Stripe? 

Patrick and John Collison.

Patrick and John Collison.

John Collison is the 28-year-old Irishman who, alongside his brother Patrick, founded the payments software company Stripe. 

A Harvard University dropout, Collision is the current President of the company and Forbes values his worth at $2.1 billion. 

In 2017, then 26-year-old John Collison was named the youngest self-made billionaire in the world with a net worth of $1.1 billion thanks in part to Stripe. His older brother Patrick also joined him among the youngest billionaires in the world, both then worth $1.1 billion.

He now lives in San Francisco, California. 

Read more: Meet the humble 29-year-old Irish CEO in charge of a $9.2 billion startup

What about his company Stripe? 

Founded in 2010 by the Collison brothers, Stripe is an online payments technology. The basic principle of the company is that it helps businesses and individuals accept payments over the internet.

The company initially worked with other start-ups, but now includes juggernauts like Nike, Macy’s, GE, Adidas, Facebook, and Lyft as its customers.

Who else is on the Forbes Top Eight Billionaires under the age of 30 in 2019? 

Kylie Jenner attends the 61st Annual GRAMMY Awards at Staples Center on February 10, 2019 in Los Angeles, California. (Photo by Matt Winkelmeyer/Getty Images for The Recording Academy)

Kylie Jenner attends the 61st Annual GRAMMY Awards at Staples Center on February 10, 2019 in Los Angeles, California. (Photo by Matt Winkelmeyer/Getty Images for The Recording Academy)

As well as Collison and Jenner, the list contains plenty of new billionaires who have inherited their money from family companies, including Alexandra Andresen and Katharina Andresen, Norwegian sisters who became billionaires when they each inherited 42 percent of the family-owned investment company Ferd. 

First on the list is Gustav Magnar Witzoe, the 24-year-old worth some $3 billion as the part owner of his father's fish farming business, Salmar ASA.

With Collison second on the list, Snapchat founder Evan Spiegel is in third place, reported as being worth $2.1 billion. 

What would you do with a billion dollars? Let us know in the comments section, below. 

This July IrishCentral pays tribute to the International Irish who are breaking the mold, smashing glass ceilings, and emerging as the next generation of global thinkers and leaders. You can follow IrishCentral’s International Irish throughout by using the hashtag #InternationalIrish or by following us on Facebook, Twitter, Instagram or LinkedIn.

Find more in IrishCentral’s business section here.

Read more: High flier: Forbes adds Ryanair's Michael O'Leary to its annual billionaires list

John Collison, President & Co-Founder of Stipe speaks at Forbes Under 30 Summit at Pennsylvania Convention Center on October 5, 2015, in Philadelphia, Pennsylvania.Photo by Lisa Lake/Getty Images