I have recently been following a local group of chicken folks on fb - it's been interesting. There's a lot of Road Island Reds, Bard Rocks (you know, the ones that look like Shakespeare) and Americanas (very patriotic) everywhere. Most of them use CCLB for Cream Legbars, and I guess as long as everyone knows what they are, then it doesn't matter too much. But, of all folks that should know better, then, I got an order of GFF 's SRBs with "Isbar" on the NPIP certification and really thought I should contact them and tell them about the name change.I always call them Cream Legbars... they should all be crested, putting crested in front implies there is a non crested... JMO...
And I wouldn't worry about what GFF calls their Silverudd Blues, but you can always put (formerly Isbars) in your post...
But really, it's all up to you and what you prefer... many use dufferent terminology, if any are confused they can always ask...