No... upright bass is a bass. There are violins, violas, cellos and basses.
The name for a large cello is a 4/4 cello or a full size.
ViolinViolaCelloBass
The Double Bass has several different names such as the; String Bass, Upright Bass, Standup Bass or Contrabass.
In the violin family, the next in pitch above the cello is the viola. The cello is the bass of the violin family. The violin itself is the soprano, and the alto is the viola. There have been tenors made of this family from time to time, but they are not in any way standard instruments and are usually called by the name tenor violin.
tuba double bass bass clarinet
Strings ... along with the bass, or contrabass.
Esperanza Spalding
Viola, Violin, Bass, Cello.
A bass fiddle is another name for a double bass.
contrabass(aka double or upright bass)
The Cello is short for the Violoncello. The Cello evolved from the viola da gamba or Viol. I hope that answered your question and the double base is not the violonbase, it is just a double base.
Bass, Double Bass, Violin, Harp, Viola, Cello. The harp is an instrument with strings, which are plucked, but it is not normally considered one of the 'strings' sections.