Thank you, I will.
Family legends are notorious for this kind of thing. In the U.S., for example, almost every family has the legend that they have native Americans somewhere in their family tree, and this turns out almost always to be false when DNA is examined. My family also has the legend that we are part “Pennsylvania Dutch” or Amish. This has also proved not to be true.
This kind of coincidence is also how (false) folk etymologies get started, such as the idea that the word “posh” derives from an acronym about cruise ships “Port Out, Starboard Home.”
Finally, I can’t think why, in the context of the poem, Kipling would make a reference to a component of pool tables. In my mind the word “Lazarushian” is more likely one of his creative neologisms, of which there are other examples in this thread. Or, just possibly, that he had heard the expression before, and it popped into his head as a new expression when he was composing his poem, without any intention on his part to refer to a commercial product. A product which, by the way, would more likely have been referred to at the time as “Lazarus leather” rather than “Lazarushian.”
I’m not saying absolutely that your family legend is false, only that its accuracy is doubtful.