In-form Pedersen eased to a four-shot victory in the Andalucia Costa del Sol Open de Espana after signing off with a 66 at Real Club De Golf Guadalmina for a 15-under-par 273 total.
It was the 24-year-old’s fourth triumph in eight starts while she also emulated Marie-Laure de Lorenzi, who achieved the feat 31 years ago, by completing a title hat-trick after consecutive wins in Saudi Arabia earlier in the month.
“It was very special with my dad, Jesper, here,” said Pedersen, who had already secured victory in the Road to Costa Del Sol Order of Merit title battle. “He got me into golf and he has been a big support the whole way, he kept me going when I was down and it is really big for me to have him here and win this amazing trophy.
“I was really happy to go through something really positive and good with him because he is right beside me off the course and now he has been there on it.”
Pedersen, who had finished the third round with an eagle, secured her latest success in style, carding six birdies, including five on the back nine, in a bogey-free effort.
She left Nuria Iturrioz trailing in her wake as the home player had to settle for second spot after a closing 69, with another Spaniard, finishing four strokes further back in third position.
MacDonald, who is clearly growing in confidence after starting to see her hard work and patience being rewarded, finished birdie-birdie as she closed with a 73 to finish in a tie for 11th on three-under.
This encouraging effort, which earned her a cheque worth around £11,000, came on the back of a top-10 finish in the Omega Dubai Desert Classic, the strong finish to the season seeing the 30-year-old Nairn woman finish 22nd in the Costa del Sol Order of Merit.
Kylie Henry, who finished joint-19th in Spain on one-over after a closing 74, claimed the honour of top Scot in the standings as she ended the campaign in 13th spot.