I've taught my students (English language learners) to just mentally insert a name they like for an unknown name. Doesn't take the time of going through and crossing them out, but drives home the point that "it's just a name... you don't NEED to know how to pronounce it to figure out how many gallons of juice he can make with so many cans of concentrate."
It's also a good skill to have when reading literature. I use the example of me reading Harry Potter (as an adult, reading children's literature at that) with my students: I had read the first TWO books before I thought to Google how to pronounce the name Hermione. I had been saying it wrong in my head all along, but because I could just sort of skip over it, it didn't affect my enjoyment or comprehension of the story.
Side note: And then there's my one seventh grader who keeps changing the names to Booger. I giggle in my head every time.
