New Zealand Prime Minister Jacinda Ardern said the "well planned" shootings could "only be described as a terrorist attack".
In a livestream video that appears to show the shooting, the suspected gunman tells people to "subscribe to PewDiePie".
Felix Arvid Ulf Kjellberg famously known as PewDiePie, known for his YouTube video content has expressed his utter disgust at the terrorist taking his name before committing the terror attack, at a Friday congregation in downtown New Zealand.
New Zealand police have charged a 28-year-old man with murder, and have taken two others into custody.
As news continues to break on the horrific massacre that happened at two New Zealand mosques overnight, indications suggest that the shooter might've been an least a partial admirer of President Donald Trump.
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Syrian refugee Khaled Mustafa, who had arrived in New Zealand with his family just months ago, was amongst those killed on Friday. The death toll from Friday's mass shooting at two New Zealand mosques has been increased to 50, police said on Sunday.
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'My heart and thoughts go out to the victims, families and everyone affected by this tragedy, 'he added.
His channel has long dominated YouTube and courted controversy along the way.
PewDiePie is known for posting humorous clips and playing live-streamed video games for his almost 90 million followers on YouTube, making him the site's most watched blogger.
In 2016, he was temporarily blocked from Twitter after joking he had joined the Islamic State group. As of now, #PewdiPie is currently trending on Twitter and lots of them have come out in Felix's support.
"You had nothing to do with the tragedy that has unfolded, nor did you ask for your name to be invoked by a insane, violent person", wrote one person.
Ardern also went on to offer 'the strongest possible condemnation of the ideology of the people who did this.' "You may have chosen us, but we are utterly reject and condemn you", she said. This is about all of us. "Not letting the narrative of mass murderers win".