On gloss:

bersa
x1 is a son of mother/father/parents x2 [not necessarily biological].

On affix form:

sonci
x1 is a soldier/warrior/fighter of army x2.

In definition:

be'aspe
x1 is a daughter-in-law/son-in-law (a spouse of a child of) of x2 according to law/custom x3.
besmamta
m1=b2 is the mother of son m2=b1.
noltrube'a
x1 is a prince, son of king/queen x2 who reigns over x3
pavmombesy'utka
x1 is path-connected to x2 via the male-only first-born progeny/primogeniture relation; x1 is the first-born son of the first-born son of ... the first-born son of x2, connected by a graph-path passing through intermediate relations/steps (successive first-born sons) x3 (ce'o; ordered list).
paznu
x1 is a non-binary offspring/child of parent(s) x2 [not necessarily biological]; x1 is filial (but not a son or daughter).
bes
Son

In notes:

pavmompazy'utka'au'ypanzi
x1 is any child of the first child of the first child of ... the first child of x2, where the graph geodesic through the ancestorship-directed family tree from x1 to x2 is of length (x3) + 1 (li; x3 must be a nonnegative integer or positive infinity), and where "first" is according to (partial) ordering rule x4 (default: chronological order of birth per successive generation within the given lineage; other restrictions on legitimacy etc. may be specified here as well).
pavmompazy'utka'ypanzi
x1 is any child of the first child of the first child of ... the first child of x2, with intermediate steps x3 (complete ordered list, "ce'o"; should include the relevant parent of x1), where "first" is according to (partial) ordering rule x4 (default: chronological order of birth per successive generation within the given lineage; other restrictions on legitimacy etc. may be specified here as well).
selrirspe
x1 is the spouse of the child/offspring/protegé of x2 by standard/law/custom x3.