Board Thread:General Discussion/@comment-166.137.88.23-20130610185107/@comment-4913740-20130628141610

94.192.168.247 wrote: also eli and david has 6 other siblings, and this references les enfantes terribles where there were originally 8 clones, but only solid and liquid survived.

id say thats enough evidence. I'd like to point out that, firstly, this claim is only stated in Konami-licensed materials, written by external authors. The claim itself is that there were actually eight BATCHES of clones, not eight clones themselves. With the ninth batch, the genetic code was corrected and resulted in the birth of simply the twin Snakes.

Again, not actually confirmed canon, and it doesn't even claim there's six other clones.