1588-1664.
In 1612, married one of cartographer Jodocus Hondius's daughters and began working as a publisher in Amsterdam. From 1616 until his death, Janssonius published numerous maps of various parts of Europe. From the 1630s, he worked in partnership with his brother-in-law Henricus Hondius.
Sveriges sjökartor – A. Hedin.
HAMMERSVELDT, EVERARD[EVERT] SYMONSZ van.
1591-1653.
Engraver Amsterdam. For Hondius and Jansson 1628-1658, for 1633 edition Mercator-Hondius, for Speed's Prospect 1627, for Blaeu 1631, for le Clerc 1619, for Jod. Hondius. II (ca. 1625).
Tooley.
Ca. 1700.
Holländsk skeppare och kartritare. Inga upplysningar hittade.
Ingermanlandiae – Homanns Erben 1734
Oxel, Sorbus suecica - Lindman, C. A. M, Bilder ur Nordens Flora 1917-26.