The deadly blaze that claimed the lives of a Brooklyn woman and three of her children may have been sparked by a Hanukkah menorah, a source told The Post.

“This may be the source of the fire because it was in the room on the first floor where the fire was predominately contained,” the law enforcement source said.

Relatives told investigators that the Azan family had an oil-fed menorah inside the first-floor room at 1946 E. 14th St. in Sheepshead Bay.

The fire was reminiscent of a 2015 conflagration that killed seven children of another Orthodox Jewish family in Brooklyn.

That fire was ignited by a hot plate that malfunctioned while keeping food warm. It had been left on so the Sasoon family could observe a religious rule against working on the Sabbath.

Mom Gayle Sassoon, 45, and her second-eldest child, 15-year-old Tziporah, escaped the inferno by jumping from the Bedford Avenue home’s second floor.

In an added twist, The Yeshiva World reported that some of the Azan children killed Monday were classmates of the dead Sassoon kids.

According to the National Fire Protection Association, fire departments in the US responded to an average of 8,690 residential fires started by candles, per year between 2011 and 2015.

The fires caused an annual average of 82 civilian fire deaths and 800 civilian fire injuries.

December is the peak time of the year for home candle fires, according to the NFPA, which said more than half of home candle fires happen when the flames are too close to combustible materials.

Olive-oil menorahs like the one suspected of causing the deadly Brooklyn fire are preferred by some Jews who believe they more accurately celebrate the Hanukkah miracle.

The holiday celebrates victory over a tyrant king and the rededication of the Temple in Jerusalem, where a one-day supply of olive oil lasted eight days.

Oil menorahs’ cups must hold enough liquid to burn for the required time — at least 30 minutes on weeknights, and up to 1 ¹/₂ hours on Friday evening.

Cotton wicks also are preferred because of the smooth flame they produce, according to the Hasidic Web site chabad.org.

Both oil menorahs and those using wax candles pose a serious fire hazard and should be watched closely.

“Everyone should be careful with children in the house with flames and heat,” said a police source.

“You can’t leave them unattended at night when you’re sleeping.”