The phrase "a given relative" is correct and usable in written English.
It can be used in contexts where you are referring to a specific relative that has been previously mentioned or is understood in the discussion.
Example: "In the context of family dynamics, a given relative can significantly influence one's upbringing and values."
Alternatives: "a specific relative" or "a particular relative".
There was a large variation in measured branch diameter at a given relative distance from the tip of the tree at a given nominal post-thinning stand density even with trees with obvious stem damage excluded (Fig. 2).
The factors that determine a preference for a given relative helix orientation are incompletely understood.
The scatter of effective Young's modulus for a given relative density is sensitive to void overlapping.
At a given altitude, to each value of the stock density is corresponding a stable equilibrium characterised by a given relative cover of each vegetation component.
This exhaustive study revealed attractive structures having high specific stiffness, up to twice as large as the usual octet-truss for a given relative density.
The viscous Poisson's ratio for a given relative density is also dependent on the local configuration and the ratio of grain boundary energy to surface energy.
A critic may wonder what reasons there are for calling the relation of meeting objections to a given claim relative to an evaluation system a relation of coherence.
We compared the relative expression of all 14 genes in a given cell relative the reference samples.
Thus, the HC describes the relative proportion of the watershed area that lies above a given height relative to the total relief of the watershed.
Relative diversity (HpR ) per 1 Mb window, calculated as the proportion of heterozygosity in a given pool relative to total heterozygosity within the source Fd03 colony.
It measures the popular vote in a given state relative to the national popular vote.
