SAN DIEGO (CNS) - The richest San Diegan as determined by Forbes magazine in its list Thursday of the world's wealthiest people is Cargill heiress Gwendolyn Sontheim Meyer.

The 50-year-old Rancho Santa Fe resident, worth an estimated $3.3 billion, is the world's 344th richest person, according to the magazine.

Meyer is one of seven relatives who have a stake in Cargill, a Minneapolis-based food production firm that is the largest privately owned company in the U.S.

Among recognizable San Diegans listed, Qualcomm co-founder Irwin Jacobs of La Jolla ranked 913th with $1.4 billion, and money manager Charles Brandes of San Diego was 960th with $1.3 billion.

The richest man in the world, for the third year in a row, is telecom magnate Carlos Slim Helu of Mexico, with an estimated worth of $69 billion.

The list includes 1,226 billionaires with a combined worth of $4.6 trillion, up 2 percent.