Harmen Janse Ryckman (my 9th great grandfather) came to the New World with at least one child - his daughter Margarita (Grietje) Harmense Ryckman. By 1662 Grietje had married Jacques Cornelise Van Slyke
, the son of Cornelis Antonissen Van Slyke and his Mohawk wife, Ots-Toch.
Jacques and Grietje settled in the new village of Schenectady. Grietje's father lived in Albany as early as 1666 and there he died circa 1677
Harmen was living near Albany in 1667 as per a court record which states "....in his [Robert Sanders] house and lot standing here and lying here in Albany, adjoining to the south and east the street, to the north Harmen Janse Ryckman, and to the west Volkie Jurriaense, widow of the late Jan Van Hoesen..."
[Source: Early Records of the City and Colony of Albany and Colony of Rensellaerswyck, 1656-1675, translated by Jonathan Pearson. Vol. 1:410]
Harmen's brother, Jan Janse Ryckman, married Tryntie Janse and settled in Beverwyck. By 1663 Jan was dead, his widow remarried to Eldert Gerbertse Cruyff. They had one son living in 1663 - Albert Janse Ryckman, married to Neeltie Quackenbos. From this line came many of the Ontario Rykman families.
I have more information online at The Ryckman Family - Harmen Janse Ryckman of New Netherland New York