Casario II is a stallion who has won many times at the 1.50 m level with Mark Van Dijck and Yves Vanderhasselt and that is partly due to his drive and jumping quality. Those traits he passes on to his offspring and that is greatly appreciated by the end user in the sport.

Kalesch van Markieslanden, the mother of Isario, is also the mother of five international jumpers:
- Ned Boy de Walput
- Poechpa de Walput
- Rakker de Walput
- Urania de Walput
- Valencia de Walput