Short answer. No, it stays yours. Article 1780 of the Civil Code defines a universal partnership of profits as comprising only what the partners acquire by their industry or work during the partnership — since an inheritance is acquired by succession rather than by industry or work, it falls outside that scope and does not become partnership property.
What the law says
A universal partnership of profits comprises all that the partners may acquire by their industry or work during the existence of the partnership.
Civil Code, Article 1780 — Universal Partnership of Profits. Read the full provision →
What the law says
Movable or immovable property which each of the partners may possess at the time of the celebration of the contract shall continue to pertain exclusively to each, only the usufruct passing to the partnership.
Civil Code, Article 1780 — Universal Partnership of Profits. Read the full provision →
Universal partnership of profits covers industry or work only
Article 1780 defines this specific type of partnership narrowly: a universal partnership of profits comprises all that the partners may acquire by their industry or work during the existence of the partnership. The scope is tied to what the partners actually earn through their labor or effort while the partnership exists — it is not a catch-all for everything a partner happens to acquire, by whatever means, during that period.
Why an inheritance falls outside that scope
An inheritance is acquired through succession, not through a partner's industry or work — it comes to you because of your relationship to the person who left it, not because of anything you did or earned as a partner. Since Article 1780 limits the universal partnership of profits to acquisitions by industry or work, an inheritance received during the partnership does not fit the description of what the partnership comprises, and stays yours individually.
How this compares to property held before the partnership began
The article separately addresses property a partner already possessed when the partnership contract was made: movable or immovable property which each of the partners may possess at the time of the celebration of the contract shall continue to pertain exclusively to each, only the usufruct passing to the partnership. That rule covers pre-existing property, letting the partnership use it while ownership stays with the original partner. An inheritance received during the partnership is a different situation again — it was neither pre-existing property nor earned by industry or work.
What the article does not spell out
Article 1780 defines the boundaries of what a universal partnership of profits comprises, but it does not itself use the word inheritance or address gratuitous acquisitions like gifts or inheritances received during the partnership by name. The conclusion that such an inheritance stays outside the partnership follows from the article's own limiting language — acquisition by industry or work — rather than from any express statement about inheritances specifically.