In the dictionary of personal names Petrovsky there is a wholelist of names from which Seva is abbreviated. Among them are those that are very rarely used today. For example, Eusebius or Sevir. It is not often to meet men who call themselves that. But there are those names that are still in progress.

The most common option
Full name Seva may not be soexotic. So you can reduce and "Vsevolod". A man with that name will have remarkable character traits. The Old Slavonic name stands for "owning everything." He is very honest and decent. The name Vsevolod gives his owner royal patience, the ability to ignore the annoying little things and misunderstandings, to concentrate on the most important things in life.
Full name Seva - Sevastyan

Full name Seva - Severyan
Stubborn to cruelty, purposeful, ableto get wish. Such is Seva, whose full name is Severyan. This person is very reliable, but closed and uncommunicative. From Greek, his name translates as "son of the strict." Among the negative traits of character note ambition, envy. Although such Seva is a reliable support in life, if you manage to win him over.
So what is he - Seva
It is clear that the character traits of your friend withthis name will be determined by what its full name is. Seva can be both Vsevolod and Severyan. There is a possibility that he will be called Evsevon, as Petrovsky points out. The main feature of Seva is reliability and loyalty. You can rely on him, whatever his full name.

This is an even rarer scenario.But do not be surprised if they tell you that they met Seva, and then it turns out that this is not a young man at all. In the same dictionary there is a mention of the fact that such a reduction is possible from female names. For example, Sevastyana and Eusebius can turn into Seva, if you follow the conclusions of Petrovsky. Now the Old Slavonic names are becoming more and more common. Of course, it’s still very difficult to meet a girl who was called Feosevia at birth, but Severin is found. Decreasingly, it will be called Seva. It turns out that the name is not only male. I wonder what character traits it gives its owners, regardless of gender? Does it affect the manifestation of a person’s non-gender-specific character traits?
How does the name seva affect the character
Even the sound of the word is already talking about softness.The name Seva is very gentle, affectionate, even fluffy. If to spell out letters, then each of them bears its own characteristics to the owner of the name, but they all concentrate around communication, contacts with people, spirituality. It turns out that a person who associates himself with this name, in addition to his will, adds warmth and sincerity to his character. People who willingly communicate with him are drawn to him. Sev, as a rule, has many friends.