The 'lanyard knot' is also called a diamond knot/boatswain's whistle knot/Chinese button knot/knife lanyard knot and there's probably a couple more names for it out there depending on the source.
For this paracord cross, I used two strands of paracord. I used a couple of strands that were about 3.5 feet for the vertical section with six knots and 2.5 feet for the horizontal section with four knots. The inner strands were left in, but this could be done with the cord gutted.
With one strand, from the center, I made a small loop then tied six lanyard knots for the vertical section. Each knot is worked up as close as possible to the previous one, except for a bit of space left between the second and third knots for the cord of the second strand to pass through.
The second strand has four knots, the first two knots tied and worked close together, then I pulled the two working ends through the space in the vertical section, and tied two more lanyard knots, working them close together to eliminate any slack. The working ends from both sections are trimmed and tucked back into the knots.
And a another one made with gutted cord and used as a pocket knife fob.
The knots are tied one after the other, with the slack between them worked out before tying the next knot.