Rare Relationships  It is possible to have a sibling that is more than a half sibling but less than a full sibling For example if one of the childs parents dies and the surviving parent marries a sibling of the deceased spouse and they have a child the two children would be threequarter siblings to each other They would share one parent in common but share all four grandparents Essentially the two children would be half siblings through one parental line and first cousins through the other parental line  It is my motion that this tract be deleted from the article  When doing research it is next to impossible to come across any material referring to this setup as threequarter siblings  Just because you may share all four grandparents in common does not make you any more a sibling to someone than a runofthemill halfsibling  Your proximity of relationship to your siblings is determined by your parents and if you share one parent with someone they are your halfsibling  Even if your father happens to be the uncle of your halfsister that is irrelevant for definitional purposes  Halfsibling is included in this article because it is a widelyused term threequarter sibling is most certainly not as even light research will reveal     Well its certainly interesting and one need only the most basic understanding of genetics to know that such a sibling would certainly share a much closer genetic relationship than normal If the term isnt used it can simply be written three quarter sibling     Sibling Discussion  The link with the Dutch Broer is not correct In Dutch you have the words Broer Brother and Zus Sister But there is no translation for Sibling    And some languages dont seem to have words for just brother or just sister For example I believe in Thai theres phichai older brother nongchai younger brother phisow older sister nongsow younger sister Neither chai nor sow nor chaisow are used Phinong may be used to refer collectively to older and yonger brothers and sisters or even a group of people    Say Sue and Jeff each had a halfsister Mary in common However Sue has Marys mother  while Jeff has Marys father What kind of relationship would that be between Sue and Jeff   Im not sure whether they would even be related at all     If I understand your question the way you understand it then there is no blood relationship between Sue and Jeff and they are classed as stepsiblings    A former next door neighbour of mine is in the position of Mary and he has actually had one of his half sisters marry one of his half brothers No blood relationship and raised in different countries  Lance Tyrell  Why is the Simple English article linking to Sister  Im lazy right now but there is a slang use of Bro check urbandictionary for full description but its basically if you live in the  black dickies skinmetalmulishasrh whatever t shirts  same brand but tilted hiphop fashion hats and dvscirca shoes Also they are huge douchebags   HalfSibling Discussion  A stepsibling  bears no blood relation and A half sibling  is a sibling with one shared biological parent contradict  many half siblings are stepsiblings and vice versa  On a different note is an adopted sibling considered a stepsibling This is completely inaccurate  no stepsibling is referred to as a halfsibling and no halfsibling is referred to as a stepsibling  Halfsiblings share one biological parent and therefore if your mother remarries for example you do not thereafter refer to a new baby as your stepsibling  He or she will be your halfbrother or sister and one simply never refers to a halfsibling as a stepsibling  Similarly