Its called lanyard knot. Another name would be false turkshead or knife lanyard knot.
How to tie a Spanish Bowline
▶ How to Tie the Ideal Paracord Lanyard Knot (Two Strand Diamond Knot) - YouTube
Reference of the different para cord braids. This is from a website that sell para cord products, I just like the reference image.
video tutorial - two-strand lanyard knot - ABoK #802
Super Easy Sailor Knot Bracelet for Valentine's Day - Wear
Simple and secure rope knots for WSS Camping Hammock
Knife lanyard/key fob