Dea. John Willis - John Willis transported on the ship Paul in 1635

I wouldn't make the assumption that "transported" = "criminal". Mr. Hotten copied the original ship's manifests verbatim, and their word usage is often very sloppy. If there is a mention of "oath of allegiance" and/or "conformity (to church of England)", they may have indentured themselves (having no money to pay passage) but they're probably not convicts.

There are sources that will tell you exactly who *was* a convict (and often what they were convicted of), such as:

The Complete Book of Emigrants in Bondage 1614-1775, by Peter Wilson Coldham
Bonded passengers to America, by Peter Wilson Coldham
Criminal ancestors: a guide to historical criminal records in England and Wales, by David T Hawkings
To Maryland from Overseas, by Harry Wright Newman (Maryland-specific)

Note: it's much easier to find records of persons deported to Australia, as the Aussies have made no bones about having "convict" ancestors.