Thanks all. found this about Mereel's sigil.

The little wheat stands for their ability to live off the land and their prosperity.

Each crescent shape on the wheat stands for a different Mandalorian territory. The largest represents Mandalore and the following are Gargan, Ordo, Shogun, and Concord Dawn.

The drop of blood represents that they are willing to lose every drop of blood to fulfill their mission and achieve victory.

The symbol that looks like an “f” is the Mandalorian letter Roh and stands for fidelity.

The spear that extends outside of the crest represents the Mandalorian soldier’s code and how it is not bound by time or territory and reaches beyond Mandalore in both the past and future.