Haplotype[1] Convergence is a term used in the study of DNA.
Basically the haplotype, (series of closely related genetic markers), distribution within one DNA lineage overlaps with the haplotype distribution of another lineage - its like overlapping branches from two different trees.
The more likely reason for a match is convergence (coincidence) or because of a shared common haplotype. Convergence: Mutation is a random process and over thousands of years can occur in different lines so that by coincidence different lines end up with matching haplotypes.
"This accidental agreement is called convergence. The more markers that are tested, the less likely it is that convergence will be observed".[2]