They’re finishing the jobs their fathers started.

Thirteen probationary firefighters — all children of FDNY members killed in the 9/11 terror attacks — graduated from the Fire Academy on Tuesday, filling the shoes of the dads they lost 18 years ago.

The latest class is made up of the largest group of so-called “legacy” probies in FDNY history — 21 in total, including some whose first-responder parents were killed by illness related to their work at Ground Zero.

“Today, these 21 legacies are no longer children,” Fire Commissioner Daniel Nigro told the 301 graduates and their families during the emotional ceremony at the Christian Cultural Center in Brooklyn.

“Today, they’ve fully achieved their dreams. They’re honoring now their loved ones. They’re continuing their family’s ­legacy of service.”

Here’s the baker’s dozen of Bravest continuing in the footsteps their fathers (insets).

1. Matthew Jovic, 28

Matthew was just 10 when he lost father, Lt. Anthony Jovic.

The dad had served in the department for 12 years by 9/11 — most recently with Engine 279 in Brooklyn — and was studying for the captain’s exam when tragedy struck.

Jovic, 39, was supposed to be off duty that day — but was called in when the attacks took place — and becoming one of 12 firefighters in his company to perish.

His remains were never found, though his badge was recovered. He was hailed as a “Croatian Hero” in the Croatian newspaper Ina Vukic.

2. Anthony Ragaglia, 25, and 3. Leonard Ragaglia Jr., 28

Leonard called his father his “first hero” and “first best friend” as a child.

Leonard Sr., 36, was a member of Engine 54 in Manhattan when he died — the same station house Leonard Jr. will be joining.

“Hearing all the great stories about the stuff he did when he was a firefighter, all the people he’s helped, the great friends he’s made. It’s just very exciting to start that ourselves,” said Leonard Jr.

He said walking across the stage during the ceremony to shake Nigro’s hand was a surreal moment.

“Just being in that whole air, that whole atmosphere, was an emotional moment,” Leonard Jr. said. “[Dad] was sitting in those chairs, did the same thing we did. [Now we’re] getting to follow in his footsteps.”

The Ragaglia brothers were excited to carry on their father’s legacy. Anthony will join Engine 217 in Brooklyn.

“I think with honoring him, it became more of the real world today,” Anthony said. “It hit more to home today.”

4. Gregory Kumpel, 28

Choosing a career in the FDNY would have come as a surprise to Kenneth B. Kumpel, his son Gregory said.

“I just wanted to play baseball growing up,” said Greg. But his ambitions changed after watching his brother join the FDNY.

“Honestly, it was a calling. Baseball kind of ran its course,” Gregory explained of his switch.

“I wanted to help the general public, be there when someone needs you — when someone’s in need and it should be your good instinct.”

He remembered his 42-year-old dad, of Ladder 25 in Manhattan, as “strong yet kind and compassionate.”

“I remember him being very tough on me and at same time great showing us how to handle ourselves well,” said Gregory, who is assigned to Engine Co. 80 in Harlem.

“I remember him being a bit serious — and then I hear about him in the firehouse.”

Kumpel said the memories are what got him through the aftermath of Sept. 11 as a child: “Those first months afterwards were a blur, emotional, numb, so to have those stories to help us get through tough times.”

5. Peter J. Carroll

Peter’s dad, Peter Carroll, 42, was a 19-year veteran working at FDNY Squad 1 in Brooklyn on 9/11.

“He loved to spend time with me and I loved that,” his wife, Toni Ann, told the Staten Island Advance in the days after the 9/11 attacks.

“He’s always been there for me — emotionally and spiritually. He’s never left my side,” she said.

Firefighter Steve Beyar, who served with Carroll in Squad 1, called him “the funniest man I knew” — but said no one was more serious when it came time to jump into action and save lives, the paper said.

6. John C. Fischer, 27

John’s father, Capt. John R. Fischer, 46, worked at Ladder 20 in Soho. The younger Fischer was one of three children born to John and Jean Fischer.

The fire captain, a lifelong resident of West Brighton, SI, coached his two sons in basketball and soccer, and his daughter in soccer, according to his obituary in the Staten Island Advance.

“He never cared if the kids won the game,” his wife told the newspaper.

“He was more interested in how they grew up, knowing right from wrong, being able to make decisions.”

The elder Fischer began his career as a special-education teacher and went on to work for the Salomon Brothers investment-banking house before joining the FDNY in 1983.

7. Scott B. Larsen

Scott’s father, Scott Andrew Larsen, served on Ladder 163 in Queens and was working in the rotation at Ladder 15 on South Street on 9/11.

He and his wife were awaiting the birth of their fourth child when he was killed.

August Larsen — 5-year-old Scott B. Larsen’s little brother — was born two days later.

8. Rebecca L. Asaro, 27 and 9. Marc A. Asaro, 25

The FDNY is a family affair for the brother-sister duo, whose older siblings, Matthew and Carl, are already city firefighters.

Their father, Carl Asaro, 39, spent his 14-year career at Ladder 4 in Midtown.

“It’s a lot of emotion. [I’m] more proud everyone, my brother,” said Rebecca. “It’s a big accomplishment. We all stuck together and got by.”

10. Brendan R. Regan, 30

Brendan, who will join Engine 289 in Queens, said he couldn’t stop thinking about his dad, Lt. Robert Regan, 48, at the graduation ceremony.

“Of course I miss my dad all the time but I know he’d be happy for me,” Brendan said. “I think my dad just set the bar high. The things he did that day, he was just going to work that day. I’m just trying to do the same things on this job.”

11. Manny A. Mojica, 23

Manny’s father, Manuel Mojica Jr., 37, worked at Squad 18 in Manhattan.

Manny was one of Manuel Mojica’s two children, whom he coached in Little League. Nicknamed “Manny Mo,” the Manhattan firefighter had six tattoos, a Harley and “a fingerless whistle so loud he always used it instead of the doorbell,” the Better Angels memorial site said.

The Bronx-born firefighter, who moved to Queens to raise his family, had an after-shift ritual — milk and cookies.

12. Robert J. Foti, 29

Robert is proud to be joining the FDNY at the same age as his namesake father, who worked at Ladder 7 and died at age 42.

“I’m focused on being a better person and helping others,” the son said.

Mom Florence Foti beamed, “It’s over. You did it. It’s a new chapter of Bobby’s life!”

13. Michael J. Florio, 24

Graduation day would have been filled with jokes cracked by John Joseph Florio, son Michael said, recalling his dad as a “the jokester of the fire house.”

“I know he would be proud,” said Michael, a dad of year-old twins. “This was a long time coming, something I’ve been wanting to do since 9/11. It was just a matter of time.”

The newly minted fireman will work out of Ladder 111, which shares a station house with Engine 214 in Bedford-Stuyvesant — where John Joseph was working when he sacrificed his life at age 33.

“I’ve been in and out of that house since I was young,” said Michael. “His picture is all over that firehouse. It’s more of a motivating thing than a sad thing.”

“Definitely big boots to fill,” he added.

Additional reporting by Jorge Fitz-Gibbon