A family tree is "un arbre généalogique" in French.
The format of a family tree is the same regardless of what language you use.
Arbre généalogique
A tree.
It is probably a place or family name meaning "the oak wood". "oak tree" is "chêne" in French, "oak wood" is "chêneraie" in modern French.
"family" in French is "la famille"
Grands-parents.
un arbre généalogique
Un prunier (masc.) is a plum tree in French.
Lilas is the name for the small tree 'lilac' in French.
Un arbre généalogique
Un sapin (masc.) is a fir (tree) in French.
l'arbre means the tree