Segregating the witness (signature) data from the transactional data is similar to the structure used in Hyperledger Fabric. Curious about the derivation of SegWit?
OP clearly felt his question was adequately answered by Pieter Wuille's comment:
Segregated Witness (on a Bitcoin-like system) was first deployed in Elements Alpha, released in May 2015, while the Hyperledger project only started in December 2015. It's also a very straightforward design (and arguably Bitcoin's legacy one was the weird one), several from scratch projects never considered anything else
Is SegWit derived from Hyperledger Fabric?
No, the dates above make this very unlikely.