Sweret amulets (called serekhs by Petrie) preserved the name1. These elongated beads in various materials are mostly inscribed1,2. They were placed on the neck of mummies of Dynasty 12-191

Carnelian H 3.9
Middle Kingdom Dynasty 12
MET #22.1.271

Green and violet glaze
L 5.0, W 1.5 Late Dynasty 18
reign of Horemheb © 2017 University
College London LDUCE-UC #12551

References

1Petrie W M F. Amulets, 1914, p. 21 and Figs. 77a-e
2Andrews C. Amulets of Ancient Egypt, 1994, p. 99 and Figs. 77d, 100d