More than one person can be registered as owners of the same land. This is known as co-ownership. Co-ownership can be either a 'joint tenancy' or 'tenancy in common'.
When an interest in land is granted (by conveyance or gift) to two or more people, legislation determines whether the co-owners are presumed to be either joint tenants or tenants in common. Such presumptions will always be subject to the express language of the grant.
The legislative presumptions mentioned above vary from state to state.