Title: LEA 090/1 Relatives

Q: nagyszülő lánytestvére
("nagy-nagynéni")
A: great-aunt / grandaunt
Just as a person's parents' parents are grandparents, the parents' aunts and uncles are grand-aunts and uncles. Likewise, a person's great-grandparents' siblings are great-grandaunts, and additional greats are added as the generational gap increases. Although grand-aunt or uncle is the official title, grand-aunts and uncles are often referred to as great-aunts and uncles, and many families simply use the title "aunt" for grand- and great-grandaunts and uncles. The title of great or grand-aunt also applies to sister-in-laws, not just sisters by blood.

Q: sibling
A: (fiú- vagy lány)testvér

Q: spouse
A: házastárs

Q: offspring
A: leszármazott, ivadék, sarj

Q: unokaöccs
-  unokahúg
A: nephew    /ˈnefjuː/   /ˈnevjuː/
the son of your brother or sister; the son of your husband’s or wife’s brother or sister
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-   niece

Q: a házastárs rokonai, ill. a házassággal szerzett rokonság
- anyós, após, sógor, sógornő, vő, meny
A: in-laws
- mother-in-law, father-in-law, brother-in-law, sister-in-law, son-in-law, daughter-in-law

Q: jövendőbeli(m)
A: (my) wife / husband-to-be

Q: féltestvér (fiú)
+ mostohatestvér (fiú)
A: half-brother
a person’s half-brother is a boy or man with either the same mother or the same father as they have
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+ stepbrother
the son from an earlier marriage of your stepmother or stepfather

Q: keresztapa
A: godfather

Q: keresztelő
A: baptism / christening
Technically "baptism" is the rite in the Christian Church by which immersion in water symbolizes the washing away of sins and admission into the Church, whereas "christen" is to name (a baby) at baptism as a sign of admission to the Christian Church.
They are generally used interchangeably.