Personal Names with si and sina

Personal names have their own phrase-marker series in Filipino. Use si for one personal-name pivot and sina for a plural named or associated group. English normally leaves a name unmarked—“Maria arrived”—so remembering the marker is one of the first important English-to-Filipino adjustments.

The personal-name marker series

Si and sina show the same broad pivot contrast that ang and ang mga show with common nouns, but the forms are reserved for personal names and closely related name-like expressions. Other syntactic roles select corresponding personal forms.

These are not articles. A personal name is usually referential already; the marker tells you how that named participant fits into the clause.

The actor-voice pivot is si Mariel. English has no word corresponding to si, but omitting it in the neutral Filipino clause is not an option.

The patient-voice verb tinawagan makes Jun the pivot, so he takes si. Mariel is the non-pivot actor and takes ni. Voice and participant role—not English subject/object order—determine the two forms.

Si marks one personal-name pivot

Use si with a given name, surname, full personal name, nickname, or a title plus personal name when that person is the pivot or identified phrase.

The negative sentence keeps si before both contrasted names. Negation changes the assertion, not the personal-name marker.

The question particle ba follows the first constituent nasa pulong. The name remains si Mina.

When two people share a given name, fuller naming or a contrastive description identifies the intended person.

The marker is repeated because each contrasted name heads its own phrase. Si itself does not mean “the specific one”; the full names and contrast establish the reference.

Sina marks more than one named person

Use sina once before a coordinated list of personal names. Do not combine si with mga and do not repeat sina before every member.

The list is plural, but each name remains unchanged. Sina carries the group marking.

Filipino also allows sina before one overt name when that name stands for a known associated group: the named person and family, friends, colleagues, or companions.

The plural pronoun nila confirms the group reading. Exactly who belongs to the group must be recoverable from context. If only Joel arrived, use si Joel.

This associated-group use is common in everyday conversation (neutral/informal). In formal writing (formal), list the members or name the group explicitly when precision matters.

Ni, nina, kay, and kina complete the system

Names do not keep si/sina in every role. A personal-name possessor takes ni or nina.

The second sentence can mean one house associated with both people. Context decides whether they own it jointly or simply live there; nina marks the plural personal possessor but does not encode the legal relation.

A recipient, destination, or person used as an oblique phrase takes kay or kina.

With one overt name, kina Rosa is plural and conventionally points to Rosa's home or the place associated with Rosa and her group. Kay Rosa instead focuses on Rosa as one person or destination. Learn the individual marker pages for the full range of uses.

Which names count as personal?

People's names take the personal series. Names of places, companies, schools, books, and events normally use the ordinary common/nonpersonal series.

The institution takes ang, while the person takes ni. Do not use si Paaralang Malaya.

Individually named animals often take si in affectionate everyday usage (informal/affectionate), especially when treated as family members. Some speakers instead retain ang for an animal name. Fictional and personified characters (literary) also readily take personal marking. This variation reflects animacy and social treatment, not capitalization alone.

Titles and kinship words can function like names—si Ate, si Kuya Ben, si Kapitana Reyes—when they identify a person. Their social and register conditions are covered under kinship terms as names and titles.

A name can be used as a label rather than an identified person

In an existential, a speaker can present a name as new, incomplete identifying information.

This is common (informal) when the speaker does not know which Carlo is meant. The more explicit May isang nagngangalang Carlo... is available (formal). Once the person is established as a discourse participant, ordinary personal marking returns: Nasa lobby si Carlo.

This shifted use supports the larger principle: bare and marked noun phrases receive their interpretation from construction and discourse, not from an English-style article system.

Common Mistakes

Using ang with an ordinary personal name

Ang is the corresponding marker for a common or nonpersonal phrase, not the neutral marker for a person named Liza.

Using mga instead of sina for a named pair

Use one sina before the whole coordinated list.

Keeping si in a possessive phrase

The pivot marker si is not used either; the role selects ni Maria.

Using plural sina for only one intended person

The original is grammatical only with a genuinely plural associated-group meaning. Choose si when exactly one named person is intended.

Key Takeaways

Use si for one personal-name pivot and sina for a named or associated group. Switch to ni/nina for non-pivot actors and possessors, and to kay/kina for recipients, destinations, and other oblique roles. Nonpersonal names normally use ang/ng/sa. Because the markers encode noun type, role, and number, none is simply an English article.