Simonas (shortened as Simas) is a Lithuanian masculine given name, a cognate of Simon, and may refer to: Simonas Daukantas (1793–1864), Lithuanian writer, ethnographer and historian Simonas Glinskis (born 1983), Lithuanian director of photography and cameraman Simonas Krėpšta (born 1984), Lithuanian orienteering competitor Simonas Martynas Kosakovskis (1741–1794), Polish-Lithuanian nobleman and military commander Monsignor Simonas Morkūnas (1902–1997), Lithuanian-born American priest Simonas Serapinas (born 1982), Lithuanian professional basketball forward Simonas Stanevičius (1799–1848), Lithuanian writer and a nationalist activist