Short answer. Yes, in intestate succession among siblings. When brothers and sisters of the full blood survive together with those of the half blood, the law entitles each full-blood sibling to a share double that of each half-blood sibling, rather than an equal split between the two groups.
What the law says
Should brother and sisters of the full blood survive together with brothers and sisters of the half blood, the former shall be entitled to a share double that of the latter.
Civil Code, Article 1006 — Full Blood Takes Double the Half Blood. Read the full provision →
The double-share rule
Where brothers and sisters of the full blood survive together with brothers and sisters of the half blood, the law is direct: the former shall be entitled to a share double that of the latter. A full-blood sibling's individual share is fixed at twice what each half-blood sibling receives, rather than the two groups splitting the inheritance in any other proportion. The article speaks only of brothers and sisters; it does not itself extend the double-share formula to nephews and nieces inheriting by representation, a related but separate question governed elsewhere in the rules on intestate succession.
Why full and half blood are treated differently here
Full-blood siblings share both parents with the deceased, while half-blood siblings share only one. This provision reflects that difference by weighting the shares rather than treating every sibling, regardless of how they are related to the deceased, identically. It applies specifically to the situation where both kinds of siblings survive together and are inheriting as such, so it does not come into play if only full-blood or only half-blood siblings are the ones actually inheriting. It is also worth being clear that the rule is one of intestate succession. Where the deceased left a will instituting brothers and sisters, Article 848 applies instead, and the inheritance is distributed equally between full and half blood unless a different intention appears. The doubling is what the law supplies when the deceased said nothing; it is not a floor a testator has to respect.
How the doubling actually plays out
In practical terms, the estate available to the surviving siblings is divided so that each full-blood sibling's portion is twice the size of each half-blood sibling's portion. With, say, two full-blood and one half-blood sibling, the full-blood shares would each be double the half-blood share, meaning the total is effectively split as though there were five equal units, two apiece for the full-blood siblings and one for the half-blood sibling. The precise arithmetic depends on how many siblings of each kind are actually inheriting.
Where this rule fits
This is a rule about siblings inheriting from each other, applicable to the specific circumstance where full-blood and half-blood siblings survive and inherit together. If you are trying to work out how an estate should be divided among a mixed group of siblings, this double-share rule is the starting point for that particular calculation, though how it interacts with other heirs or other rules depends on who else, if anyone, is also entitled to a share of the same estate. Two of those rules matter often. Under Article 1003 collateral relatives such as siblings succeed only where there are no descendants, ascendants, illegitimate children or surviving spouse — so the doubling never arises while a nearer heir lives. Under Article 1001, where brothers and sisters or their children survive with a widow or widower, the spouse takes one-half and the siblings the other half; the doubling then operates only inside that sibling half, not across the estate.
Related provisions
- Civil Code, Article 1006 — Full Blood Takes Double the Half Blood
- Civil Code, Article 848 — Full-Blood and Half-Blood Siblings
- Civil Code, Article 1003 — When Collaterals Succeed
- Civil Code, Article 1001 — Spouse With Brothers and Sisters