Merge two row records

I have 2 tables

Person Table

PersonID   Firstname LastName 1              a         b 2              c         d 3              e         f 4              g         h 5              i         j 

Incident Table

InicdentID PersonID  1             1 1             2 2             3 2             4 3             5 

I want to STUFF Name with semicolumn for one Incident

IncidentID Name  1            ab;cd 2            ef;gh 3            ij