mamaya

Possibly from the following:

Initial reduplication of obsolescent root maya (“after a short period”).
From mam- +‎ baya (“toleration”), according to Panganiban (1972).
From Sanskrit समय (samaya) with the first syllable mistaken as the sa- prefix, then reduplication into maya-maya, then inflected as mamaya-maya, then underwent clipping, according to Pardo de Tavera (1887). Compare Javanese ꦱꦼꦩꦪ (semaya, “to postpone; to delay”), Old Javanese samaya, Indonesian semaya.

mamayâ or mámayâ (Baybayin spelling ᜋᜋᜌ)

“mamaya”, in Pambansang Diksiyonaryo | Diksiyonaryo.ph, Manila, 2018
Panganiban, José Villa (1973) Diksyunaryo-Tesauro Pilipino-Ingles (overall work in Tagalog and English), Quezon City: Manlapaz Publishing Co., page 689
Serrano-Laktaw, Pedro (1914) Diccionario tagálog-hispano, Ateneo de Manila, page 827.
Serrano-Laktaw, Pedro (1889) Diccionario Hispano-tagálog‎, Manila, page 208.
Trinidad Hermenegildo Pardo de Tavera (1887) El sanscrito en la lengua tagalog‎ (in Spanish), Paris: Imprimerie de la Faculté de Médecine, A. Davy, page 37
Noceda, Fr. Juan José de, Sanlucar, Fr. Pedro de (1860) Vocabulario de la lengua tagala, compuesto por varios religiosos doctos y graves‎ (in Spanish), Manila: Ramirez y Giraudier
Santos, Fr. Domingo de los (1835) Tomas Oliva, editor, Vocabulario de la lengua tagala: primera, y segunda parte.‎ (in Spanish), La imprenta nueva de D. Jose Maria Dayot
San Buena Ventura, Fr. Pedro de (1613) Juan de Silva, editor, Vocabulario de lengua tagala: El romance castellano puesto primero‎, La Noble Villa de Pila

mamaya

Tagalog