He was likely the son of Pierre van Eynde, organist of the Church of Saint-Éloi in Dunkirk (French Flanders, then part of the Habsburg Netherlands).
It is not known where Jacobus learned his art, but he probably studied with Jan and Guilielmus van Belle [nl].
[1] He was renowned for the quality of his instruments and was referred to as the pinnacle of the West Flemish Baroque.
His work was the pinnacle of the Langhedul [nl] school, via Nicolaas Helewoudt and Jan and Guilielmus van Belle.
[9][10] Van Eynde's style is part of the line of continuity that can be discerned in the 17th-century South Flemish organ building, heralded by Matthys Langhedul and further spread by the Ypres Jan and Guilielmus Van Belle and the Bruges residents Nicolaas Helewout and Boudewijn Ledou.