Howell YDNA Group 2 and Trent YDNA Group 1 have a common male ancestor around 1446CE likely in England or Wales. (Source FTDNA advanced BigY SNP Testing, Time Tree and GlobeTrekker Mapping).

Results: BigY SNP Male Lineage from Ancient on the left to modern on the right.
M269>L23>L51>P310>L151>P312>Z290>L21>S552>DF13>DF21>Z16267>F24434>FGC23381>BY11699>FGC23377>FTE61881 COMMON MALE ANCESTOR and LINE SPLIT (Howell goes to FTE60829 and TRENT goes to FTJ23802)
https://discover.familytreedna.com/groups/howell/tree?subgroups=17931

From the common male ancestor branch at FTE61881, the Howell lines proceed to R-FTE60829 as the family migrated to NY, while the Trent male line goes to FTJ23802 and migrates to Henrico County Virginia. Additional BigY Testing is planned for the Trent side as they currently have only two members tested. For BigY testing at least two closely related members should be tested with a goal to follow the Rule of Three when starting a new BigY-700 project. The Howell side has tested four members and created two male lineage branches from the original NY and Marsh Gibbon ancestors.