The mark is an alchemical sign for sal ammoniacus (“salt of Amun”, ammonium chloride) so called because of deposits near the Temple of Jupiter Amun in Ancient Libya.
The mark is similar to the astrological symbol used for the planet Uranus.
The mark is used as a symbol for an extra solar planet called Ummo in some UFO theories  Ufologists believe the beings of that planet to be in contact with those on ours. See also: Who are these Ummits ?
The mark is similar to a symbol used by the Giurisdavidic movement founded by Davide Lazzaretti in the latter 19th Century.
The mark is similar to the Cyrillic symbol 'Ж', pronounced 'Zhe'. It is the 9th letter of the Ukrainian alphabet, which may suggest a connection to Mikhail, who was born in Kyiv.
The mark is similar to one of the symbols for the Pisces zodiac sign.
The mark is similar to the pattern on a basketball.
The symbol is similar to a mark found in Discordianism, and is a symbol of Eris goddess of strife, discord, contention and political rivalry. Marking it also a good symbol for someone who has committed a crime like Juliet's.
The mark is similar to the so-called Delphic Epsilon symbol used by the Epsilon Team - a rumoured secret society formed to promote ancient Greek culture.
The symbol is a graph of a hyperbola on the x-y cartesian coordinate plane. The lines are mirror images that never intersect and both stretch to infinity.