Gretar Tryggvason, Professor and Head of the Mechanical Engineering Department at the Worcester Polytechnic Institute
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14988 Tryggvason (1997 UA7), a Main-belt Asteroid discovered in 1997
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Bjarni Tryggvason (born 1945), Icelandic-born Canadian engineer and a former NRC/CSA astronaut
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HNoMS Olav Tryggvason, built for the Royal Norwegian Navy by the naval shipyard at Horten in the early 1930s
Olaf Tryggvason | HNoMS Olav Tryggvason | HNoMS ''Olav Tryggvason'' | Gretar Tryggvason | Bjarni Tryggvason | 14988 Tryggvason |
According to Aðalbjörn Tryggvason of Sólstafir, this demo was recorded in one of Iceland's national parks, Þingvellir.
In the 1190s, two sagas of Olaf Tryggvason were written in Iceland, by Oddr Snorrason and Gunnlaugr Leifsson.