'popularly considered' is correct and can be used in written English.
You can use 'popularly considered' to express an idea that most people believe or agree with. For example: Popularly considered, the most effective way to lose weight is through a combination of diet and exercise.
He is popularly considered to be on the right side of Britain's biggest political argument.
LOSING America is popularly considered to have been one of the things that cost King George III his sanity.
The canal is popularly considered to be the boundary between agricultural downstate Delaware and the northern industrial region.
Of the ballet's three sections, "Emeralds" (Faure) is popularly considered an homage to France, "Rubies" (Stravinsky) to America and "Diamonds" (Tchaikovsky) to Russia.
Although Johannes Brahms's four symphonies are popularly considered to be no less important than the greatest earlier symphonies, the contribution of his contemporary Anton Bruckner is controversial.
The two men, along with Thomas Keller of French Laundry in California, are popularly considered to be the foremost proponents of "molecular gastronomy".
Three thousand pounds would buy three consultations and a lethal dose of the drug popularly considered to be the least physically and emotionally traumatic way to go.
This tree is considered, popularly if not legally, to be the full heir of the original tree.
The yoga guru, known popularly as Sri Sri and considered close to prime minister Narendra Modi's government, was initially defiant.
For Outliers, Gladwell spent time looking for research that made claims that were contrary to what he considered to be popularly held beliefs.
It had a statue of the Hayagriva (said to have been sculpted by Lodro Rinchen himself in gilded copper), also known popularly as Avalokiteśvara, which was considered the protective deity of the monastery.
