Howell YDNA Group 2 and Trent YDNA Group 1 have a common male ancestor around 1450CE in England (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 (ENDS AT 1450CE WITH THE LAST 5 PV's UNMATCHED)
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 retains the FTE61881 and migrates to Henrico County Virginia. Additional BigY Testing is planned for the Trent side as they currently have only one member 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.