The three-day tournament, which ended on Saturday, saw the youngster putting on a consistent play to claim the title from former champion William Howard.
Williamson shot a one-over par 71 to take an early lead on day one on Thursday.
He managed an outstanding on par performance on day two followed by another one-over-par 71 on Saturday, for a total gross of 212.
Second placed Ned Howard, who finished seven shots behind Williamson, improved steadily after posting four-over-par 74 on day one and two to hit an improved one-over-par 71 to amass a total gross of 219.
Daniel Webb, who also managed a total gross of 219, finished on third place after countback.
Williamson and Howard also managed the top two places, respectively, in the senior men’s nett division.
In the open women’s competition, defending champion Rotana Howard retained her title after recording a four-shot win over Tepua Russell.
Rotana, who did not had a perfect start, managed a brilliant one-over-par 71 on the second day before posting an eight-over-par 78 for a total gross of 232.
Russell scored a total gross of 236 to finish second followed by Ake Unuka on 245.
Aside from the open competition, most of the other golfers were battling it out in their handicap divisions with results based on nett scores.
Anything could have happened in the final round, and in many cases, it did. A few players had large leads, but could not hold those in the final round.
Others were involved in very tight battles that went right down to the wire.
Some notable performances included Joe Browne and Brent Hayden both running away with the Intermediate Men’s and Junior A Men’s divisions respectively by 11 shots after leading all the way.
Paul Brown came from behind with a great final round to take out the Junior B Men’s division title.
In the ladies section, Alice Mitchell held a large lead into the final round, but struggled on the last day with Rita Howard putting on a storming finish to take out the top spot.
In the junior ladies, 12-year-old Jakana Tare from Aitutaki played extremely well, but it wasn’t enough to beat Jacqui Lemaire whose game continues to improve.
The World Amateur Golf Ranking (WAGR) sanctioned tournament was sponsored by Scotty’s Golf Pro Shop from Whitford in Auckland.
Results; Open Men - Kristopher Williamson 212 (71, 70, 71), Ned Howard 219 (74, 74, 71), Daniel Webb 2z19 (72, 73, 74); Open Women – Rotana Howard 232 (83, 71, 78), Tepua Russell 236 (79, 79, 78), Ake Unuka 245 (81, 80, 84); Handicap divisions: Senior Men: Nett Scores – Kristopher Williamson 206, Ned Howard 207, Sonny Karati 209; Intermediate Men – Joe Browne 203, Peter Sneddon 214, Davey Roa 215; Junior A Men – Brent Hayden 199, Darrell Brown 210, Ianis Boaza 213; Junior B Men – Paul Brown 208, Ken Matheson 213, Chris Will 213; Veterans Men – Glenn Armstrong 205, Aukino Tairea 213, Tikaka Henry 213; Senior Ladies – Rita Howard 205, Ake Unuka 212, Tania Karati 213; Junior Ladies – Jacqui Lemaire 203, Jakana Tare 209, Kura Tetauru 213;
Veterans Ladies – Maara Kenning 206, Tere Hardie 206, Tuaine Marsters 212.