  We theoretically investigate the possibility of obtaining Majorana zero modes
(MZMs) in penta-silicene nanoribbons (p-SiNRs) with induced \textit{p}-wave
superconductivity. The model explicitly considers an external magnetic field
perpendicularly applied to the nanoribbon plane, as well as an extrinsic Rashba
spin-orbit coupling (RSOC), in addition to the first nearest neighbor hopping
term and \textit{p}-wave superconducting pairing. By analyzing the dispersion
relation profiles, we observe the successive closing and reopening of the
induced superconducting gap with a single spin component, indicating a
spin-polarized topological phase transition (TPT). Correspondingly, the plots
of the energy spectrum versus the chemical potential reveal the existence of
zero-energy states with a preferential spin orientation characterized by
nonoverlapping wave functions localized at opposite ends of the superconducting
p-SiNRs. These findings strongly suggest the emergence of topologically
protected, spin-polarized MZMs at the ends of the p-SiNRs with induced
\textit{p}-wave superconducting pairing, which can be realized by proximitizing
the nanoribbon with an \textit{s}-wave superconductor, such as lead. The
proposal paves the way for silicene-based Majorana devices hosting multiple
MZMs with a well-defined spin orientation, with possible applications in
fault-tolerant quantum computing platforms and Majorana spintronics.
