Hey All!
The first and third pictures are Phal type Denrobiums. Just in case you don't know the difference...a Phal type blooms from the top of mature growth, with a long spike that has buds along it. The nobile types bloom all along the cane from each internode. There may be more than one bloom at the internodes but they don't send out a blooming spike. The middle picture is a Phaleanopsis. All 3 pics are of complex hybrids and it would be impossible to come up with a cultivar name without a tag. Hope this helps some!
Dawn and Skip