Helenius is both a surname and a given name. Notable people with the name include: People with the surname. Ari Helenius (born 1944), Finnish professor of biochemistry. Jani-Petteri Helenius (born 1990), Finnish professional ice hockey player. Juhani Helenius (born 1933), Finnish sprint canoeist. Nicklas Helenius Jensen (born 1991), Danish professional football forward. Riku Helenius (born 1988), ice hockey goaltender. Robert Helenius (born 1984), Finnish professional boxer. Sami Helenius (born 1974), ice hockey defenceman. People with the given name.
https://en.wikipedia.org/wiki/Helenius