Dennis de Booij 🇳🇱

Blue belt Verified by the community730 / 200 points

UNDERHOOK SOCIETYLeiden, Netherlands2 years on the mats

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#8,128worldwide by community verification points

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About

Training since first belt2 year(s) and 11 month(s)
Training logged487hr 20m

LocationLeiden, Zuid-Holland, Netherlands
AcademyUNDERHOOK SOCIETY Verified

Training history

Achievements

2 of 18 unlocked

Current rank verified by promoting instructor

Profile manually reviewed & certificate issued

Name verified by credit card

Verifications received14 / 25

102550

Years trained2 / 5

5101520

Gold medals0 / 5

51025

Competition matches0 / 10

1050100

Forum posts5 / 500

5001,000

Upcoming event

Spring Camp 2027

Tallinn, Estonia

Apr 122027

Upcoming events

Spring Camp 2027

Tallinn, Estonia

Apr 122027

Coaches

Iwan Hansen

Black belt 1st degree

UNDERHOOK SOCIETYLeiden, Netherlands

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Gallery

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Juggy van Beek. K-guard seminar

Helio Moreira SONECA BJJ Seminar on half guard. 14 December 2025, Leusden, the Netherlands

Trained at CVA jiujitsu in Edinburgh together with fellow globetrotters David Rogers (coach) and Nathan Ferguson.

Attended BJJ Globetrotters Spring Camp in Tallinn Estonia. 14 April to 19 April 2025.

Remco Pardoel seminar Leiden 23 March 2025

Thiago Abreu seminar on sweeps from spider/lasso/DLR guard combinations on Oct 6, 2024 @ BJJ Leiden, The Netherlands

Attended Spar Wars on 14 Jan 2024 in Dordrecht, The Netherlands. Two hours of sparring.

First BJJ training with Iwan Hansen at USC Leiden

Promotion history

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Blue belt Current belt
May 23, 2025Underhook Society, Leiden, The Netherlands
1 year, 4 months, 8 days
Promoted by
Iwan HansenCONFIRMED
- Stripe 1September 12, 2025
White belt
October 13, 2023Leiden, The Netherlands
1 year, 7 months, 10 days
- Stripe 1December 15, 2023
- Stripe 2May 31, 2024
- Stripe 3September 13, 2024
- Stripe 4December 6, 2024