As of the date of my comment here, this is the only photo of the normal species type Cissus rhombifolia. All others are a specific cultivar, likely 'Ellen Danica', that has been selected for abnormal, but beautifully formed leaves. The common name "Oakleaf Ivy" is correctly attached to culleaf forms, like 'Ellen Danica'. The species type, with rhombic, uncut leaves is Grape Ivy, not Oakleaf Ivy.

Given that the other photos are not designated as a particular cultivar, they are more correctly named
Cuissus rhombifolia aff. 'Ellen Danica'.