The forms in brackets are older forms though they might be used as well as the newer ones.

Plural.

MasculineNeuterFeminine
N. and V.moji (ani.)
mé, moje (inan.)
(moje) (moje)
O., (moje) (moje) (moje)
P.mých
D.mým
L.mých
I.mými

The possessive pronoun, like the adjective, must agree with the noun it modifies in gender, number and case.

Tvůj, tvá, tvé (thy, thine) your, yours, as well as the reflexive possessive svůj, svá, své, are declined like můj, , .

The use of the reflexive possessive “svůj.”

Svůj is used when the subject is the possessor.

Jdu se svým bratrem.I go with my (own) brother.
Jdeš s mým bratrem.You go with my brother.
Jdeš se svým bratrem.You go with your (own) brother.
Nesu svou knihu.I am bringing my (own) book.
Neseš mou knihu.You are bringing my book.
(On) Nese svou knihu.He is bringing his own book.
Nese tvou knihu.He is bringing your book.
(On) Má svou hlavu.He has (he acts according to) his own head (mind).

Observe: Vidím tvého bratra (anim.) Vidím tvůj klobouk (inanim.) Moji bratři jsou zde (anim.) Moje kabáty jsou zde (inanim.)