roots and relationships of the Amya family

[M Sjostrom]

a remarkable family of Dutch merchants apparently flourished in the 16th and
17th centuries: ones surnamed Amya
They seemingly caught prominence in several countries.

In some literature, some of them are mentioned as 'Amaya'. That's an Iberian
name, probably.

1) choices of their first names are profoundly jewish: Michael, David,
Matthew, and some marriages ('Abrahamsdochter') indicate other jewish
connections.
Is it known whether their medieval roots would have been jewish ?
http://genealogics.org/pedigree.php?personID=I00481618&tree=LEO

2) how close relatives to one another were:
Michael Amya - who married in 1639, a daughter of that Dutch industrialist
who built a commercial and technical empire in Sweden
http://genealogics.org/getperson.php?personID=I00254014&tree=LEO

David Amya - merchant in Gothenburg, Sweden, and lived married at least in
the 1640s (his wife was Antoinetta Hartzen/Hertzen) - they were parents of
another David Amya, also merchant in Gothenburg
http://genealogics.org/getperson.php?personID=I00487300&tree=LEO

Matheus Amya - lived married at least in the 1650s
http://genealogics.org/getperson.php?personID=I00481618&tree=LEO

as far as I understand, they might even be brothers - but what do sources
say?
Herman Amya deceased in 1629, and would possibly have had his first children
in 1610s