There are many unrelated Wessel families in New Netherland/NY in this time period. I did a study on them (not complete) and can give you the following info on your Warner:
In 1655 Warner Wessels and Anna Elisabeth Maskop were the sponsor at the baptims of Elisabeth, d/o Lodevyck Corneliszen [Post] and Agnietje Boons.
These church records can be viewed online at Olive Tree Genealogy (my site). Start at http://olivetreegenealogy.com/nn/church/rdcbapt.shtml
Warner Wessels can be found on the RDC members list on p. 501 - the list begins in 1649 on p. 497 and ends in 1659 on p. 539. This is also online (the entire Membership list) starting at http://olivetreegenealogy.com/nn/church/rdcmembers.shtml
Anna and Warner had 6 proven children, 5 were bpt in the Reformed Dutch Church of New Amsterdam/NY - these can be found online. Briefly they are:
Your ancestor, Gerardus' bpt is found on date 1657 Apr 8. He is also named as a sibling of Christian [sic] Wessells, widow of Jacob Teller in her will, dated September 17, 1698.
Passenger lists as we think of them, did NOT exist for this time period. What we have is the list of those who still owed passage money - the list of those who paid has never been published.
On Olive Tree, one of my pet projects has been to reconstruct the names of those who sailed on ships from Holland to New Netherland (NY) 1624-1686. I used several primary sources, including notarial records and contracts from Amsterdam.
You can see all the known ships and names of those who sailed (those names that can be found, remember we don't know who came over with passage paid up front) at http://olivetreegenealogy.com/nn/ships/
What makes you think that Metje Boonen is Warner's mother? She was one of the bpt sponsors for little Gerardus but I've not seen anything to indicate her relationship (if any) the family.
Of the names you listed as possible siblings of your Warner, let me quickly touch on them -- you can do the homework to figure out if the circumstantial evidence means anything :
Henrica Wessels was md to Allard Anthony and he was also a sponsor at little Gerardus' bpt. She does not name Warner in her will - naming her siblings Christina, Maria, Harmanus and Dirck. She did have a brother Warner, but not YOUR Warner - her brother Warner md Deborah Beek then Elizabeth Cornelise.
It's confusing, be careful trying to put together these family groups and don't believe everything online UNLESS it is a primary source.
Henrica is listed as "from Utrecht" at her marriage